Faster access than browser!
161 relations: Active galactic nucleus, Adaptive optics, Air shower (physics), Albert Einstein, Altazimuth mount, Angular resolution, Aperture, Aperture synthesis, Apparent magnitude, Arizona, Asteroid, Astrometry, Astronomical object, Astronomical seeing, Astronomy, Astrophotography, Atmosphere of Earth, Balloon, Big Bang, Black hole, Blink comparator, Cepheid variable, Cerro Tololo Inter-American Observatory, Charge-coupled device, Chile, Chord (astronomy), CMOS, Color index, Comet, Computer, Cone, Coordinate system, Corona, Cosmic distance ladder, Cosmic microwave background, Cosmic ray, Data, Diffraction grating, Doppler effect, Double star, Earth, Electromagnetic spectrum, Emission spectrum, Emulsion, Equatorial mount, Experiment, Far side of the Moon, Far-infrared astronomy, Galaxy, Galileo Galilei, ..., Gamma ray, Gamma-ray astronomy, General relativity, Geology, Globular cluster, Gravitational wave, Green Bank, West Virginia, HALCA, Hale Telescope, Helium, High-energy astronomy, Hubble Space Telescope, Hydrogen, Infrared, Infrared astronomy, Interferometry, La Silla Observatory, Light, Light pollution, LIGO Scientific Collaboration, List of astronomical observatories, List of radio telescopes, Llano de Chajnantor Observatory, Luminosity, Lunar observation, Maksutov telescope, Mauna Kea Observatories, Mercury (planet), Meteorology, Micrometer, Moon, Multi-messenger astronomy, Neptune, Neutrino, Neutrino astronomy, Neutrino detector, Neutron star, Newtonian telescope, Nuclear reaction, Observable universe, Observation, Observational study, Observatory, Occultation, Optical coating, Optical filter, Optical instrument, Optical spectrometer, Optical telescope, Orbit, Outer space, Outline of space science, Overwhelmingly Large Telescope, Parallax, Paranal Observatory, Paris Observatory, Perturbation (astronomy), Photoelectric effect, Photograph, Photographic film, Photometry (astronomy), Photon, Physical model, Planet, Planetary science, Pluto, Polarization in astronomy, Precession, Prism, Proper motion, Quantum efficiency, Radial velocity, Radiation, Radio, Radio astronomy, Radio telescope, Redshift, Redshift survey, Reflecting telescope, Refracting telescope, Robot, Roque de los Muchachos Observatory, Slovakia, SN 1987A, Solar core, Solar System, Space telescope, Spacecraft, Speckle imaging, Spherical astronomy, Sun, Supernova, Telescope, Temperature, Theoretical astronomy, Thermal expansion, Timeline of telescopes, observatories, and observing technology, Titanium dioxide, Ultraviolet, Ultraviolet astronomy, United Kingdom, Universe, Uranus, Variable star, Visible spectrum, Visible-light astronomy, Vulcan (hypothetical planet), Water vapor, Wavelength, X-ray, X-ray astronomy. Expand index (111 more) »
Active galactic nucleus
An active galactic nucleus (AGN) is a compact region at the center of a galaxy that has a much higher than normal luminosity over at least some portion—and possibly all—of the electromagnetic spectrum, with characteristics indicating that the excess luminosity is not produced by stars.
New!!: Observational astronomy and Active galactic nucleus · See more »
Adaptive optics
Adaptive optics (AO) is a technology used to improve the performance of optical systems by reducing the effect of incoming wavefront distortions by deforming a mirror in order to compensate for the distortion.
New!!: Observational astronomy and Adaptive optics · See more »
Air shower (physics)
An air shower is an extensive (many kilometres wide) cascade of ionized particles and electromagnetic radiation produced in the atmosphere when a primary cosmic ray (i.e. one of extraterrestrial origin) enters the atmosphere.
New!!: Observational astronomy and Air shower (physics) · See more »
Albert Einstein
Albert Einstein (14 March 1879 – 18 April 1955) was a German-born theoretical physicist who developed the theory of relativity, one of the two pillars of modern physics (alongside quantum mechanics).
New!!: Observational astronomy and Albert Einstein · See more »
Altazimuth mount
An altazimuth or alt-azimuth mount is a simple two-axis mount for supporting and rotating an instrument about two perpendicular axes – one vertical and the other horizontal.
New!!: Observational astronomy and Altazimuth mount · See more »
Angular resolution
Angular resolution or spatial resolution describes the ability of any image-forming device such as an optical or radio telescope, a microscope, a camera, or an eye, to distinguish small details of an object, thereby making it a major determinant of image resolution.
New!!: Observational astronomy and Angular resolution · See more »
Aperture
In optics, an aperture is a hole or an opening through which light travels.
New!!: Observational astronomy and Aperture · See more »
Aperture synthesis
Aperture synthesis or synthesis imaging is a type of interferometry that mixes signals from a collection of telescopes to produce images having the same angular resolution as an instrument the size of the entire collection.
New!!: Observational astronomy and Aperture synthesis · See more »
Apparent magnitude
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
New!!: Observational astronomy and Apparent magnitude · See more »
Arizona
Arizona (Hoozdo Hahoodzo; Alĭ ṣonak) is a U.S. state in the southwestern region of the United States.
New!!: Observational astronomy and Arizona · See more »
Asteroid
Asteroids are minor planets, especially those of the inner Solar System.
New!!: Observational astronomy and Asteroid · See more »
Astrometry
Astrometry is the branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies.
New!!: Observational astronomy and Astrometry · See more »
Astronomical object
An astronomical object or celestial object is a naturally occurring physical entity, association, or structure that exists in the observable universe.
New!!: Observational astronomy and Astronomical object · See more »
Astronomical seeing
Astronomical seeing is the blurring and twinkling of astronomical objects like stars due to turbulent mixing in the Earth's atmosphere, causing variations of the optical refractive index.
New!!: Observational astronomy and Astronomical seeing · See more »
Astronomy
Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.
New!!: Observational astronomy and Astronomy · See more »
Astrophotography
Astrophotography is a specialized type of photography for recording photos of astronomical objects, celestial events, and areas of the night sky.
New!!: Observational astronomy and Astrophotography · See more »
Atmosphere of Earth
The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity.
New!!: Observational astronomy and Atmosphere of Earth · See more »
Balloon
A balloon is a flexible bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, air or water.
New!!: Observational astronomy and Balloon · See more »
Big Bang
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution.
New!!: Observational astronomy and Big Bang · See more »
Black hole
A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.
New!!: Observational astronomy and Black hole · See more »
Blink comparator
A blink comparator was a viewing apparatus used by astronomers to find differences between two photographs of the night sky.
New!!: Observational astronomy and Blink comparator · See more »
Cepheid variable
A Cepheid variable is a type of star that pulsates radially, varying in both diameter and temperature and producing changes in brightness with a well-defined stable period and amplitude.
New!!: Observational astronomy and Cepheid variable · See more »
Cerro Tololo Inter-American Observatory
The Cerro Tololo Inter-American Observatory (CTIO) is an astronomical observatory located on Cerro Tololo in the Coquimbo Region of northern Chile, with additional facilities located on Cerro Pachón about to the southeast.
New!!: Observational astronomy and Cerro Tololo Inter-American Observatory · See more »
Charge-coupled device
A charge-coupled device (CCD) is a device for the movement of electrical charge, usually from within the device to an area where the charge can be manipulated, for example conversion into a digital value.
New!!: Observational astronomy and Charge-coupled device · See more »
Chile
Chile, officially the Republic of Chile, is a South American country occupying a long, narrow strip of land between the Andes to the east and the Pacific Ocean to the west.
New!!: Observational astronomy and Chile · See more »
Chord (astronomy)
In the field of astronomy the term chord typically refers to a line crossing an object which is formed during an occultation event.
New!!: Observational astronomy and Chord (astronomy) · See more »
CMOS
Complementary metal–oxide–semiconductor, abbreviated as CMOS, is a technology for constructing integrated circuits.
New!!: Observational astronomy and CMOS · See more »
Color index
In astronomy, the color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature.
New!!: Observational astronomy and Color index · See more »
Comet
A comet is an icy small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process called outgassing.
New!!: Observational astronomy and Comet · See more »
Computer
A computer is a device that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming.
New!!: Observational astronomy and Computer · See more »
Cone
A cone is a three-dimensional geometric shape that tapers smoothly from a flat base (frequently, though not necessarily, circular) to a point called the apex or vertex.
New!!: Observational astronomy and Cone · See more »
Coordinate system
In geometry, a coordinate system is a system which uses one or more numbers, or coordinates, to uniquely determine the position of the points or other geometric elements on a manifold such as Euclidean space.
New!!: Observational astronomy and Coordinate system · See more »
Corona
A corona (Latin, 'crown') is an aura of plasma that surrounds the Sun and other stars.
New!!: Observational astronomy and Corona · See more »
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects.
New!!: Observational astronomy and Cosmic distance ladder · See more »
Cosmic microwave background
The cosmic microwave background (CMB, CMBR) is electromagnetic radiation as a remnant from an early stage of the universe in Big Bang cosmology.
New!!: Observational astronomy and Cosmic microwave background · See more »
Cosmic ray
Cosmic rays are high-energy radiation, mainly originating outside the Solar System and even from distant galaxies.
New!!: Observational astronomy and Cosmic ray · See more »
Data
Data is a set of values of qualitative or quantitative variables.
New!!: Observational astronomy and Data · See more »
Diffraction grating
In optics, a diffraction grating is an optical component with a periodic structure that splits and diffracts light into several beams travelling in different directions.
New!!: Observational astronomy and Diffraction grating · See more »
Doppler effect
The Doppler effect (or the Doppler shift) is the change in frequency or wavelength of a wave in relation to observer who is moving relative to the wave source.
New!!: Observational astronomy and Doppler effect · See more »
Double star
In observational astronomy, a double star or visual double is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope.
New!!: Observational astronomy and Double star · See more »
Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
New!!: Observational astronomy and Earth · See more »
Electromagnetic spectrum
The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies.
New!!: Observational astronomy and Electromagnetic spectrum · See more »
Emission spectrum
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state.
New!!: Observational astronomy and Emission spectrum · See more »
Emulsion
An emulsion is a mixture of two or more liquids that are normally immiscible (unmixable or unblendable).
New!!: Observational astronomy and Emulsion · See more »
Equatorial mount
An equatorial mount is a mount for instruments that compensates for Earth's rotation by having one rotational axis parallel to the Earth's axis of rotation.
New!!: Observational astronomy and Equatorial mount · See more »
Experiment
An experiment is a procedure carried out to support, refute, or validate a hypothesis.
New!!: Observational astronomy and Experiment · See more »
Far side of the Moon
The far side of the Moon (sometimes figuratively known as the dark side of the Moon) is the hemisphere of the Moon that always faces away from Earth.
New!!: Observational astronomy and Far side of the Moon · See more »
Far-infrared astronomy
Far-infrared astronomy is the branch of astronomy and astrophysics that deals with objects visible in far-infrared radiation (extending from 30 µm towards submillimeter wavelengths around 450 µm).
New!!: Observational astronomy and Far-infrared astronomy · See more »
Galaxy
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.
New!!: Observational astronomy and Galaxy · See more »
Galileo Galilei
Galileo Galilei (15 February 1564Drake (1978, p. 1). The date of Galileo's birth is given according to the Julian calendar, which was then in force throughout Christendom. In 1582 it was replaced in Italy and several other Catholic countries with the Gregorian calendar. Unless otherwise indicated, dates in this article are given according to the Gregorian calendar. – 8 January 1642) was an Italian polymath.
New!!: Observational astronomy and Galileo Galilei · See more »
Gamma ray
A gamma ray or gamma radiation (symbol γ or \gamma), is penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei.
New!!: Observational astronomy and Gamma ray · See more »
Gamma-ray astronomy
Gamma-ray astronomy is the astronomical observation of gamma rays,Astronomical literature generally hyphenates "gamma-ray" when used as an adjective, but uses "gamma ray" without a hyphen for the noun.
New!!: Observational astronomy and Gamma-ray astronomy · See more »
General relativity
General relativity (GR, also known as the general theory of relativity or GTR) is the geometric theory of gravitation published by Albert Einstein in 1915 and the current description of gravitation in modern physics.
New!!: Observational astronomy and General relativity · See more »
Geology
Geology (from the Ancient Greek γῆ, gē, i.e. "earth" and -λoγία, -logia, i.e. "study of, discourse") is an earth science concerned with the solid Earth, the rocks of which it is composed, and the processes by which they change over time.
New!!: Observational astronomy and Geology · See more »
Globular cluster
A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite.
New!!: Observational astronomy and Globular cluster · See more »
Gravitational wave
Gravitational waves are the disturbance in the fabric ("curvature") of spacetime generated by accelerated masses and propagate as waves outward from their source at the speed of light.
New!!: Observational astronomy and Gravitational wave · See more »
Green Bank, West Virginia
Green Bank is a census-designated place in Pocahontas County in West Virginia's Potomac Highlands inside the Allegheny Mountain Range.
New!!: Observational astronomy and Green Bank, West Virginia · See more »
HALCA
HALCA (Highly Advanced Laboratory for Communications and Astronomy), also known for its project name VSOP (VLBI Space Observatory Programme), or the code name MUSES-B (for the second of the Mu Space Engineering Spacecraft series), is a Japanese 8 meter diameter radio telescope satellite which was used for Very Long Baseline Interferometry (VLBI).
New!!: Observational astronomy and HALCA · See more »
Hale Telescope
The Hale telescope is a, f/3.3 reflecting telescope at the Palomar Observatory in California, US, named after astronomer George Ellery Hale.
New!!: Observational astronomy and Hale Telescope · See more »
Helium
Helium (from lit) is a chemical element with symbol He and atomic number 2.
New!!: Observational astronomy and Helium · See more »
High-energy astronomy
High energy astronomy is the study of astronomical objects that release electromagnetic radiation of highly energetic wavelengths.
New!!: Observational astronomy and High-energy astronomy · See more »
Hubble Space Telescope
The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
New!!: Observational astronomy and Hubble Space Telescope · See more »
Hydrogen
Hydrogen is a chemical element with symbol H and atomic number 1.
New!!: Observational astronomy and Hydrogen · See more »
Infrared
Infrared radiation (IR) is electromagnetic radiation (EMR) with longer wavelengths than those of visible light, and is therefore generally invisible to the human eye (although IR at wavelengths up to 1050 nm from specially pulsed lasers can be seen by humans under certain conditions). It is sometimes called infrared light.
New!!: Observational astronomy and Infrared · See more »
Infrared astronomy
Infrared astronomy is the branch of astronomy and astrophysics that studies astronomical objects visible in infrared (IR) radiation.
New!!: Observational astronomy and Infrared astronomy · See more »
Interferometry
Interferometry is a family of techniques in which waves, usually electromagnetic waves, are superimposed causing the phenomenon of interference in order to extract information.
New!!: Observational astronomy and Interferometry · See more »
La Silla Observatory
La Silla Observatory is an astronomical observatory in Chile with three telescopes built and operated by the European Southern Observatory (ESO).
New!!: Observational astronomy and La Silla Observatory · See more »
Light
Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum.
New!!: Observational astronomy and Light · See more »
Light pollution
Light pollution, also known as photopollution, is the presence of anthropogenic light in the night environment.
New!!: Observational astronomy and Light pollution · See more »
LIGO Scientific Collaboration
The LIGO Scientific Collaboration (LSC) is a scientific collaboration of international physics institutes and research groups dedicated to the search for gravitational waves.
New!!: Observational astronomy and LIGO Scientific Collaboration · See more »
List of astronomical observatories
This is a list of astronomical observatories ordered by name, along with initial dates of operation (where an accurate date is available) and location.
New!!: Observational astronomy and List of astronomical observatories · See more »
List of radio telescopes
This is a list of radio telescopes - over one hundred - that are or have been used for radio astronomy.
New!!: Observational astronomy and List of radio telescopes · See more »
Llano de Chajnantor Observatory
Llano de Chajnantor Observatory is the name for a group of astronomical observatories located at an altitude of over in the Atacama Desert of northern Chile.
New!!: Observational astronomy and Llano de Chajnantor Observatory · See more »
Luminosity
In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object.
New!!: Observational astronomy and Luminosity · See more »
Lunar observation
The Moon is the largest natural satellite of and the closest major astronomical object to Earth.
New!!: Observational astronomy and Lunar observation · See more »
Maksutov telescope
The Maksutov (also called a "Mak") is a catadioptric telescope design that combines a spherical mirror with a weakly negative meniscus lens in a design that takes advantage of all the surfaces being nearly "spherically symmetrical".
New!!: Observational astronomy and Maksutov telescope · See more »
Mauna Kea Observatories
The Mauna Kea Observatories (MKO) are a number of independent astronomical research facilities and large telescope observatories that are located at the summit of Mauna Kea on the Big Island of Hawaiʻi, United States.
New!!: Observational astronomy and Mauna Kea Observatories · See more »
Mercury (planet)
Mercury is the smallest and innermost planet in the Solar System.
New!!: Observational astronomy and Mercury (planet) · See more »
Meteorology
Meteorology is a branch of the atmospheric sciences which includes atmospheric chemistry and atmospheric physics, with a major focus on weather forecasting.
New!!: Observational astronomy and Meteorology · See more »
Micrometer
A micrometer, sometimes known as a micrometer screw gauge, is a device incorporating a calibrated screw widely used for precise measurement of components in mechanical engineering and machining as well as most mechanical trades, along with other metrological instruments such as dial, vernier, and digital calipers.
New!!: Observational astronomy and Micrometer · See more »
Moon
The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.
New!!: Observational astronomy and Moon · See more »
Multi-messenger astronomy
Multi-messenger astronomy is astronomy based on the coordinated observation and interpretation of disparate "messenger" signals.
New!!: Observational astronomy and Multi-messenger astronomy · See more »
Neptune
Neptune is the eighth and farthest known planet from the Sun in the Solar System.
New!!: Observational astronomy and Neptune · See more »
Neutrino
A neutrino (denoted by the Greek letter ν) is a fermion (an elementary particle with half-integer spin) that interacts only via the weak subatomic force and gravity.
New!!: Observational astronomy and Neutrino · See more »
Neutrino astronomy
Neutrino astronomy is the branch of astronomy that observes astronomical objects with neutrino detectors in special observatories.
New!!: Observational astronomy and Neutrino astronomy · See more »
Neutrino detector
A neutrino detector is a physics apparatus which is designed to study neutrinos.
New!!: Observational astronomy and Neutrino detector · See more »
Neutron star
A neutron star is the collapsed core of a large star which before collapse had a total of between 10 and 29 solar masses.
New!!: Observational astronomy and Neutron star · See more »
Newtonian telescope
The Newtonian telescope, also called the Newtonian reflector or just the Newtonian, is a type of reflecting telescope invented by the English scientist Sir Isaac Newton (1642–1727), using a concave primary mirror and a flat diagonal secondary mirror.
New!!: Observational astronomy and Newtonian telescope · See more »
Nuclear reaction
In nuclear physics and nuclear chemistry, a nuclear reaction is semantically considered to be the process in which two nuclei, or else a nucleus of an atom and a subatomic particle (such as a proton, neutron, or high energy electron) from outside the atom, collide to produce one or more nuclides that are different from the nuclide(s) that began the process.
New!!: Observational astronomy and Nuclear reaction · See more »
Observable universe
The observable universe is a spherical region of the Universe comprising all matter that can be observed from Earth at the present time, because electromagnetic radiation from these objects has had time to reach Earth since the beginning of the cosmological expansion.
New!!: Observational astronomy and Observable universe · See more »
Observation
Observation is the active acquisition of information from a primary source.
New!!: Observational astronomy and Observation · See more »
Observational study
In fields such as epidemiology, social sciences, psychology and statistics, an observational study draws inferences from a sample to a population where the independent variable is not under the control of the researcher because of ethical concerns or logistical constraints.
New!!: Observational astronomy and Observational study · See more »
Observatory
An observatory is a location used for observing terrestrial or celestial events.
New!!: Observational astronomy and Observatory · See more »
Occultation
An occultation is an event that occurs when one object is hidden by another object that passes between it and the observer.
New!!: Observational astronomy and Occultation · See more »
Optical coating
An optical coating is one or more thin layers of material deposited on an optical component such as a lens or mirror, which alters the way in which the optic reflects and transmits light.
New!!: Observational astronomy and Optical coating · See more »
Optical filter
An optical filter is a device that selectively transmits light of different wavelengths, usually implemented as a glass plane or plastic device in the optical path, which are either dyed in the bulk or have interference coatings.
New!!: Observational astronomy and Optical filter · See more »
Optical instrument
An optical instrument either processes light waves to enhance an image for viewing, or analyzes light waves (or photons) to determine one of a number of characteristic properties.
New!!: Observational astronomy and Optical instrument · See more »
Optical spectrometer
An optical spectrometer (spectrophotometer, spectrograph or spectroscope) is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials.
New!!: Observational astronomy and Optical spectrometer · See more »
Optical telescope
An optical telescope is a telescope that gathers and focuses light, mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct view, or to make a photograph, or to collect data through electronic image sensors.
New!!: Observational astronomy and Optical telescope · See more »
Orbit
In physics, an orbit is the gravitationally curved trajectory of an object, such as the trajectory of a planet around a star or a natural satellite around a planet.
New!!: Observational astronomy and Orbit · See more »
Outer space
Outer space, or just space, is the expanse that exists beyond the Earth and between celestial bodies.
New!!: Observational astronomy and Outer space · See more »
Outline of space science
The following outline is provided as an overview of and topical guide to space science: Space science encompasses all of the scientific disciplines that involve space exploration and study natural phenomena and physical bodies occurring in outer space, such as space medicine and astrobiology.
New!!: Observational astronomy and Outline of space science · See more »
Overwhelmingly Large Telescope
The Overwhelmingly Large Telescope (OWL) was a conceptual design by the European Southern Observatory (ESO) organization for an extremely large telescope, which was intended to have a single aperture of 100 meters in diameter.
New!!: Observational astronomy and Overwhelmingly Large Telescope · See more »
Parallax
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.
New!!: Observational astronomy and Parallax · See more »
Paranal Observatory
Paranal Observatory is an astronomical observatory operated by the European Southern Observatory (ESO); it is located in the Atacama Desert of northern Chile on Cerro Paranal at altitude, south of Antofagasta.
New!!: Observational astronomy and Paranal Observatory · See more »
Paris Observatory
The Paris Observatory (Observatoire de Paris or Observatoire de Paris-Meudon), a research institution of PSL Research University, is the foremost astronomical observatory of France, and one of the largest astronomical centres in the world.
New!!: Observational astronomy and Paris Observatory · See more »
Perturbation (astronomy)
In astronomy, perturbation is the complex motion of a massive body subject to forces other than the gravitational attraction of a single other massive body.
New!!: Observational astronomy and Perturbation (astronomy) · See more »
Photoelectric effect
The photoelectric effect is the emission of electrons or other free carriers when light shines on a material.
New!!: Observational astronomy and Photoelectric effect · See more »
Photograph
A photograph or photo is an image created by light falling on a light-sensitive surface, usually photographic film or an electronic medium such as a CCD or a CMOS chip.
New!!: Observational astronomy and Photograph · See more »
Photographic film
Photographic film is a strip or sheet of transparent plastic film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide crystals.
New!!: Observational astronomy and Photographic film · See more »
Photometry (astronomy)
Photometry is a technique of astronomy concerned with measuring the flux, or intensity of an astronomical object's electromagnetic radiation.
New!!: Observational astronomy and Photometry (astronomy) · See more »
Photon
The photon is a type of elementary particle, the quantum of the electromagnetic field including electromagnetic radiation such as light, and the force carrier for the electromagnetic force (even when static via virtual particles).
New!!: Observational astronomy and Photon · See more »
Physical model
Physical model (most commonly referred to simply as a model but in this context distinguished from a conceptual model) is a smaller or larger physical copy of an object.
New!!: Observational astronomy and Physical model · See more »
Planet
A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.
New!!: Observational astronomy and Planet · See more »
Planetary science
Planetary science or, more rarely, planetology, is the scientific study of planets (including Earth), moons, and planetary systems (in particular those of the Solar System) and the processes that form them.
New!!: Observational astronomy and Planetary science · See more »
Pluto
Pluto (minor planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune.
New!!: Observational astronomy and Pluto · See more »
Polarization in astronomy
Polarization is an important phenomenon in astronomy.
New!!: Observational astronomy and Polarization in astronomy · See more »
Precession
Precession is a change in the orientation of the rotational axis of a rotating body.
New!!: Observational astronomy and Precession · See more »
Prism
In optics, a prism is a transparent optical element with flat, polished surfaces that refract light.
New!!: Observational astronomy and Prism · See more »
Proper motion
Proper motion is the astronomical measure of the observed changes in the apparent places of stars or other celestial objects in the sky, as seen from the center of mass of the Solar System, compared to the abstract background of the more distant stars.
New!!: Observational astronomy and Proper motion · See more »
Quantum efficiency
The term quantum efficiency (QE) may apply to incident photon to converted electron (IPCE) ratio, of a photosensitive device or it may refer to the TMR effect of a Magnetic Tunnel Junction.
New!!: Observational astronomy and Quantum efficiency · See more »
Radial velocity
The radial velocity of an object with respect to a given point is the rate of change of the distance between the object and the point.
New!!: Observational astronomy and Radial velocity · See more »
Radiation
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.
New!!: Observational astronomy and Radiation · See more »
Radio
Radio is the technology of using radio waves to carry information, such as sound, by systematically modulating properties of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width.
New!!: Observational astronomy and Radio · See more »
Radio astronomy
Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies.
New!!: Observational astronomy and Radio astronomy · See more »
Radio telescope
A radio telescope is a specialized antenna and radio receiver used to receive radio waves from astronomical radio sources in the sky in radio astronomy.
New!!: Observational astronomy and Radio telescope · See more »
Redshift
In physics, redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum.
New!!: Observational astronomy and Redshift · See more »
Redshift survey
In astronomy, a redshift survey is a survey of a section of the sky to measure the redshift of astronomical objects: usually galaxies, but sometimes other objects such as galaxy clusters or quasars.
New!!: Observational astronomy and Redshift survey · See more »
Reflecting telescope
A reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image.
New!!: Observational astronomy and Reflecting telescope · See more »
Refracting telescope
A refracting telescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope).
New!!: Observational astronomy and Refracting telescope · See more »
Robot
A robot is a machine—especially one programmable by a computer— capable of carrying out a complex series of actions automatically.
New!!: Observational astronomy and Robot · See more »
Roque de los Muchachos Observatory
Roque de los Muchachos Observatory (Spanish: Observatorio del Roque de los Muchachos, ORM) is an astronomical observatory located in the municipality of Garafía on the island of La Palma in the Canary Islands.
New!!: Observational astronomy and Roque de los Muchachos Observatory · See more »
Slovakia
Slovakia (Slovensko), officially the Slovak Republic (Slovenská republika), is a landlocked country in Central Europe.
New!!: Observational astronomy and Slovakia · See more »
SN 1987A
SN 1987A was a peculiar type II supernova in the Large Magellanic Cloud, a dwarf galaxy satellite of the Milky Way.
New!!: Observational astronomy and SN 1987A · See more »
Solar core
The core of the Sun is considered to extend from the center to about 0.2 to 0.25 of solar radius.
New!!: Observational astronomy and Solar core · See more »
Solar System
The Solar SystemCapitalization of the name varies.
New!!: Observational astronomy and Solar System · See more »
Space telescope
A space telescope or space observatory is an instrument located in outer space to observe distant planets, galaxies and other astronomical objects.
New!!: Observational astronomy and Space telescope · See more »
Spacecraft
A spacecraft is a vehicle or machine designed to fly in outer space.
New!!: Observational astronomy and Spacecraft · See more »
Speckle imaging
Image:Zeta_bootis_short_exposure.png|Typical short-exposure image of a binary star (Zeta Bootis in this case) as seen through atmospheric seeing.
New!!: Observational astronomy and Speckle imaging · See more »
Spherical astronomy
Spherical astronomy or positional astronomy is the branch of astronomy that is used to determine the location of objects on the celestial sphere, as seen at a particular date, time, and location on Earth.
New!!: Observational astronomy and Spherical astronomy · See more »
Sun
The Sun is the star at the center of the Solar System.
New!!: Observational astronomy and Sun · See more »
Supernova
A supernova (plural: supernovae or supernovas, abbreviations: SN and SNe) is a transient astronomical event that occurs during the last stellar evolutionary stages of a star's life, either a massive star or a white dwarf, whose destruction is marked by one final, titanic explosion.
New!!: Observational astronomy and Supernova · See more »
Telescope
A telescope is an optical instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light).
New!!: Observational astronomy and Telescope · See more »
Temperature
Temperature is a physical quantity expressing hot and cold.
New!!: Observational astronomy and Temperature · See more »
Theoretical astronomy
Theoretical astronomy is the use of the analytical models of physics and chemistry to describe astronomical objects and astronomical phenomena.
New!!: Observational astronomy and Theoretical astronomy · See more »
Thermal expansion
Thermal expansion is the tendency of matter to change in shape, area, and volume in response to a change in temperature.
New!!: Observational astronomy and Thermal expansion · See more »
Timeline of telescopes, observatories, and observing technology
Timeline of telescopes, observatories, and observing technology.
New!!: Observational astronomy and Timeline of telescopes, observatories, and observing technology · See more »
Titanium dioxide
Titanium dioxide, also known as titanium(IV) oxide or titania, is the naturally occurring oxide of titanium, chemical formula.
New!!: Observational astronomy and Titanium dioxide · See more »
Ultraviolet
Ultraviolet (UV) is electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.
New!!: Observational astronomy and Ultraviolet · See more »
Ultraviolet astronomy
Ultraviolet astronomy is the observation of electromagnetic radiation at ultraviolet wavelengths between approximately 10 and 320 nanometres; shorter wavelengths—higher energy photons—are studied by X-ray astronomy and gamma ray astronomy.
New!!: Observational astronomy and Ultraviolet astronomy · See more »
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain,Usage is mixed with some organisations, including the and preferring to use Britain as shorthand for Great Britain is a sovereign country in western Europe.
New!!: Observational astronomy and United Kingdom · See more »
Universe
The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
New!!: Observational astronomy and Universe · See more »
Uranus
Uranus is the seventh planet from the Sun.
New!!: Observational astronomy and Uranus · See more »
Variable star
A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates.
New!!: Observational astronomy and Variable star · See more »
Visible spectrum
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.
New!!: Observational astronomy and Visible spectrum · See more »
Visible-light astronomy
Visible-light astronomy encompasses a wide variety of observations via telescopes that are sensitive in the range of visible light (optical telescopes).
New!!: Observational astronomy and Visible-light astronomy · See more »
Vulcan (hypothetical planet)
Vulcan is a small hypothetical planet that was proposed to exist in an orbit between Mercury and the Sun.
New!!: Observational astronomy and Vulcan (hypothetical planet) · See more »
Water vapor
No description.
New!!: Observational astronomy and Water vapor · See more »
Wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
New!!: Observational astronomy and Wavelength · See more »
X-ray
X-rays make up X-radiation, a form of electromagnetic radiation.
New!!: Observational astronomy and X-ray · See more »
X-ray astronomy
X-ray astronomy is an observational branch of astronomy which deals with the study of X-ray observation and detection from astronomical objects.
New!!: Observational astronomy and X-ray astronomy · See more »
Redirects here:
Astronomical observation, Celestial observation.
References
[1] https://en.wikipedia.org/wiki/Observational_astronomy
