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68 relations: Abundance of the chemical elements, Astronomer, Astronomy, B-type main-sequence star, Blanketing effect, Carbon, Chronology of the universe, Collisional excitation, Color index, Cosmos Redshift 7, Dwarf planet, Effective temperature, Electron, Flux, Forbidden mechanism, Galaxy formation and evolution, Gas, Gas giant, GRB 090423, Ground state, H II region, Helium, Hyades (star cluster), Hydrogen, Infrared spectroscopy, Interstellar medium, Iron, Jupiter, Logarithm, Logarithmic scale, Magnitude (astronomy), Metal, Metallicity distribution function, Metastability, Nebula, Neon, Nitrogen, O-type star, Oxygen, Photoionization, Photometric system, Photometry (astronomy), Planet, Planetary system, Planetesimal, Proplyd, Proton, Protostar, Rest frame, Saturn, ..., Spectral line, Spectrophotometry, Spectroscopy, Star, Stellar classification, Stellar evolution, Stellar nucleosynthesis, Stellar population, Stellar wind, Sulfur, Sun, Supernova, Terrestrial planet, UBV photometric system, Ultraviolet, Universe, Visible spectrum, Walter Baade. Expand index (18 more) »
Abundance of the chemical elements
The abundance of the chemical elements is a measure of the occurrence of the chemical elements relative to all other elements in a given environment.
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Astronomer
An astronomer is a scientist in the field of astronomy who concentrates their studies on a specific question or field outside the scope of Earth.
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Astronomy
Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.
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B-type main-sequence star
A B-type main-sequence star (B V) is a main-sequence (hydrogen-burning) star of spectral type B and luminosity class V. These stars have from 2 to 16 times the mass of the Sun and surface temperatures between 10,000 and 30,000 K. B-type stars are extremely luminous and blue.
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Blanketing effect
The blanketing effect (also referred to as line blanketing or the line-blanketing effect) is the enhancement of the red or infrared regions of a stellar spectrum at the expense of the other regions, with an overall diminishing effect on the whole spectrum.
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Carbon
Carbon (from carbo "coal") is a chemical element with symbol C and atomic number 6.
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Chronology of the universe
The chronology of the universe describes the history and future of the universe according to Big Bang cosmology.
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Collisional excitation
Collisional excitation is a process in which the kinetic energy of a collision partner is converted into the internal energy of a reactant species.
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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.
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Cosmos Redshift 7
Cosmos Redshift 7 (also known as COSMOS Redshift 7, Galaxy Cosmos Redshift 7, Galaxy CR7 or CR7) is a high-redshift Lyman-alpha emitter galaxy (meaning CR7 is one of the oldest, most distant galaxies), in the constellation Sextans, about 12.9 billion light travel distance years from Earth, reported to contain the first stars (first generation; Population III)—formed soon after the Big Bang during the reionisation epoch (redshift, z ∼ 6−7), when the Universe was about 800 million years old—to have provided the chemical elements (like oxygen, nitrogen, carbon, calcium and iron) needed for the later formation of planets and life as it is known.
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Dwarf planet
A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite.
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Effective temperature
The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation.
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Electron
The electron is a subatomic particle, symbol or, whose electric charge is negative one elementary charge.
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Flux
Flux describes the quantity which passes through a surface or substance.
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Forbidden mechanism
In spectroscopy, a forbidden mechanism (forbidden transition or forbidden line) is a spectral line associated with absorption or emission of light by atomic nuclei, atoms, or molecules which undergo a transition that is not allowed by a particular selection rule but is allowed if the approximation associated with that rule is not made.
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Galaxy formation and evolution
The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have generated the variety of structures observed in nearby galaxies.
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Gas
Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma).
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Gas giant
A gas giant is a giant planet composed mainly of hydrogen and helium.
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GRB 090423
GRB 090423 was a gamma-ray burst (GRB) detected by the Swift Gamma-Ray Burst Mission on April 23, 2009 at 07:55:19 UTC whose afterglow was detected in the infrared and enabled astronomers to determine that its redshift is z.
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Ground state
The ground state of a quantum mechanical system is its lowest-energy state; the energy of the ground state is known as the zero-point energy of the system.
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H II region
An H II region or HII region is a region of interstellar atomic hydrogen that is ionized.
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Helium
Helium (from lit) is a chemical element with symbol He and atomic number 2.
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Hyades (star cluster)
The Hyades (Greek Ὑάδες, also known as Melotte 25 or Collinder 50) is the nearest open cluster and one of the best-studied star clusters.
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Hydrogen
Hydrogen is a chemical element with symbol H and atomic number 1.
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Infrared spectroscopy
Infrared spectroscopy (IR spectroscopy or vibrational spectroscopy) involves the interaction of infrared radiation with matter.
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Interstellar medium
In astronomy, the interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy.
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Iron
Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.
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Jupiter
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
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Logarithm
In mathematics, the logarithm is the inverse function to exponentiation.
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Logarithmic scale
A logarithmic scale is a nonlinear scale used when there is a large range of quantities.
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Magnitude (astronomy)
In astronomy, magnitude is a logarithmic measure of the brightness of an object in a defined passband, often in the visible or infrared spectrum, but sometimes across all wavelengths.
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Metal
A metal (from Greek μέταλλον métallon, "mine, quarry, metal") is a material (an element, compound, or alloy) that is typically hard when in solid state, opaque, shiny, and has good electrical and thermal conductivity.
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Metallicity distribution function
The Metallicity distribution function is an important concept in stellar and galactic evolution.
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Metastability
In physics, metastability is a stable state of a dynamical system other than the system's state of least energy.
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Nebula
A nebula (Latin for "cloud" or "fog"; pl. nebulae, nebulæ, or nebulas) is an interstellar cloud of dust, hydrogen, helium and other ionized gases.
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Neon
Neon is a chemical element with symbol Ne and atomic number 10.
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Nitrogen
Nitrogen is a chemical element with symbol N and atomic number 7.
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O-type star
An O-type star is a hot, blue-white star of spectral type O in the Yerkes classification system employed by astronomers.
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Oxygen
Oxygen is a chemical element with symbol O and atomic number 8.
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Photoionization
Photoionization is the physical process in which an ion is formed from the interaction of a photon with an atom or molecule.
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Photometric system
In astronomy, a photometric system is a set of well-defined passbands (or filters), with a known sensitivity to incident radiation.
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Photometry (astronomy)
Photometry is a technique of astronomy concerned with measuring the flux, or intensity of an astronomical object's electromagnetic radiation.
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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.
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Planetary system
A planetary system is a set of gravitationally bound non-stellar objects in or out of orbit around a star or star system.
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Planetesimal
Planetesimals are solid objects thought to exist in protoplanetary disks and in debris disks.
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Proplyd
A proplyd, a syllabic abbreviation of an ionized protoplanetary disk, is an externally illuminated photoevaporating disk around a young star.
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Proton
| magnetic_moment.
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Protostar
A protostar is a very young star that is still gathering mass from its parent molecular cloud.
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Rest frame
In special relativity the rest frame of a particle is the coordinate system (frame of reference) in which the particle is at rest.
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Saturn
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter.
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Spectral line
A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies.
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Spectrophotometry
In chemistry, spectrophotometry is the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength.
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Spectroscopy
Spectroscopy is the study of the interaction between matter and electromagnetic radiation.
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Star
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
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Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
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Stellar evolution
Stellar evolution is the process by which a star changes over the course of time.
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Stellar nucleosynthesis
Stellar nucleosynthesis is the theory explaining the creation (nucleosynthesis) of chemical elements by nuclear fusion reactions between atoms within the stars.
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Stellar population
During 1944, Walter Baade categorized groups of stars within the Milky Way into bluer stars associated with the spiral arms and the general position of yellow stars near the central galactic bulge or within globular star clusters.
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Stellar wind
A stellar wind is a flow of gas ejected from the upper atmosphere of a star.
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Sulfur
Sulfur or sulphur is a chemical element with symbol S and atomic number 16.
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Sun
The Sun is the star at the center of the Solar System.
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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.
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Terrestrial planet
A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals.
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UBV photometric system
The UBV photometric system (Ultraviolet, Blue, Visual), also called the Johnson system (or Johnson-Morgan system), is a wide band photometric system for classifying stars according to their colors.
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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.
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Universe
The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
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Visible spectrum
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.
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Walter Baade
Wilhelm Heinrich Walter Baade (March 24, 1893 – June 25, 1960) was a German astronomer who worked in the United States from 1931 to 1959.
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Redirects here:
Fe/H, High-metal, Hyperstar, Low metal star, Low metallicity star, Low-metal, Metal (astronomy), Metal free star, Metal-free, Metal-less, Metal-poor, Metal-poor star, Metal-rich, Metalicity, Metals (astronomy), Normal star, Population 0, Population I and II, Population Ii, Populations I and II, Star population, Stellar metalicity, Stellar metallicity, Sun Metallicity, ⟦Fe/H⟧, ［Fe/H］, ［M/H］.
References
[1] https://en.wikipedia.org/wiki/Metallicity
