Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Download
Faster access than browser!
And Ads-free!

Mira

Mira (also known as Omicron Ceti, ο Ceti, ο Cet) is a red giant star estimated 200–400 light years away in the constellation Cetus. [1]

62 relations: Abd al-Rahman al-Sufi, Algol, American Association of Variable Star Observers, Ancient Greece, Apparent magnitude, Astronomical unit, Astronomy Picture of the Day, Asymptotic giant branch, Babylon, Binary star, Bow shocks in astrophysics, Bright Star Catalogue, California Institute of Technology, Cetus, Chandra X-ray Observatory, Chinese constellations, Constellation, David Fabricius, Durchmusterung, Epoch (astronomy), GALEX, General Catalogue of Variable Stars, Henry Draper Catalogue, Hipparchus, Hipparcos, History of China, Hubble Space Telescope, Infrared, Interstellar medium, Ismaël Bullialdus, Johannes Hevelius, Johannes Phocylides Holwarda, Jupiter, Karl Manitius, Light curve, Light-year, List of stars in Cetus, Main sequence, Margin of error, Mercury (planet), Mira B, Mira variable, NASA, Orbital period, Planetary nebula, Protoplanetary disk, Ptolemy, Red giant, Smithsonian Astrophysical Observatory, Solar irradiance, ..., Solar mass, Star, Star catalogue, Stellar classification, Stellar wind, Sun, Supernova, Tycho Brahe, Ultraviolet, Ulugh Beg, Variable star, White dwarf. Expand index (12 more) »

Abd al-Rahman al-Sufi

'Abd al-Rahman al-Sufi (عبدالرحمن صوفی) (December 9, 903 in Rey, Iran – May 25, 986 in Shiraz, Iran) was a Persian astronomer also known as 'Abd ar-Rahman as-Sufi, or 'Abd al-Rahman Abu al-Husayn, 'Abdul Rahman Sufi, 'Abdurrahman Sufi and known in the west as Azophi.

New!!: Mira and Abd al-Rahman al-Sufi · See more »

Algol

Algol (Beta Per, β Persei, β Per), known colloquially as the Demon Star, is a bright star in the constellation Perseus.

New!!: Mira and Algol · See more »

American Association of Variable Star Observers

Since its founding in 1911, the American Association of Variable Star Observers (AAVSO) has coordinated, collected, evaluated, analyzed, published, and archived variable star observations made largely by amateur astronomers and makes the records available to professional astronomers, researchers, and educators.

New!!: Mira and American Association of Variable Star Observers · See more »

Ancient Greece

Ancient Greece was a civilization belonging to a period of Greek history that lasted from the Archaic period of the 8th to 6th centuries BC to the end of antiquity (circa 600 AD).

New!!: Mira and Ancient Greece · See more »

Apparent magnitude

The apparent magnitude (m) of a celestial object is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere.

New!!: Mira and Apparent magnitude · See more »

Astronomical unit

The astronomical unit (symbol au, AU or ua) is a unit of length, roughly the distance from the Earth to the Sun.

New!!: Mira and Astronomical unit · See more »

Astronomy Picture of the Day

Astronomy Picture of the Day (APOD) is a website provided by NASA and Michigan Technological University (MTU).

New!!: Mira and Astronomy Picture of the Day · See more »

Asymptotic giant branch

The asymptotic giant branch is the region of the Hertzsprung–Russell diagram populated by evolving low- to medium-mass stars.

New!!: Mira and Asymptotic giant branch · See more »

Babylon

Babylon (Bābili or Babilim; بابل, Bābil) was a significant city in ancient Mesopotamia, in the fertile plain between the Tigris and Euphrates rivers.

New!!: Mira and Babylon · See more »

Binary star

A binary star is a star system consisting of two stars orbiting around their common center of mass.

New!!: Mira and Binary star · See more »

Bow shocks in astrophysics

Bow shocks form the boundary between a magnetosphere and an ambient magnetized medium.

New!!: Mira and Bow shocks in astrophysics · See more »

Bright Star Catalogue

The Bright Star Catalogue, also known as the Yale Catalogue of Bright Stars or Yale Bright Star Catalogue, is a star catalogue that lists all stars of stellar magnitude 6.5 or brighter, which is roughly every star visible to the naked eye from Earth.

New!!: Mira and Bright Star Catalogue · See more »

California Institute of Technology

The California Institute of Technology or CaltechThe university itself only spells its short form as "Caltech"; other spellings such as.

New!!: Mira and California Institute of Technology · See more »

Cetus

Cetus is a constellation.

New!!: Mira and Cetus · See more »

Chandra X-ray Observatory

The Chandra X-ray Observatory (CXO), previously known as the Advanced X-ray Astrophysics Facility (AXAF), is a space observatory launched on STS-93 by NASA on July 23, 1999.

New!!: Mira and Chandra X-ray Observatory · See more »

Chinese constellations

Traditional Chinese astronomy has a system of dividing the celestial sphere into asterisms or constellations, known as "officials" (Chinese xīng guān).

New!!: Mira and Chinese constellations · See more »

Constellation

In modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU).

New!!: Mira and Constellation · See more »

David Fabricius

David Fabricius (March 9, 1564 – May 7, 1617), was a German pastor who made two major discoveries in the early days of telescopic astronomy, jointly with his eldest son, Johannes Fabricius (1587–1615).

New!!: Mira and David Fabricius · See more »

Durchmusterung

In astronomy, Durchmusterung or Bonner Durchmusterung (BD), is the comprehensive astrometric star catalogue of the whole sky, compiled by the Bonn Observatory (Germany) from 1859 to 1903.

New!!: Mira and Durchmusterung · See more »

Epoch (astronomy)

In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.

New!!: Mira and Epoch (astronomy) · See more »

GALEX

The Galaxy Evolution Explorer (GALEX) is an orbiting ultraviolet space telescope launched on April 28, 2003, and operated until early 2012.

New!!: Mira and GALEX · See more »

General Catalogue of Variable Stars

The General Catalogue of Variable Stars (GCVS) is a list of variable stars.

New!!: Mira and General Catalogue of Variable Stars · See more »

Henry Draper Catalogue

The Henry Draper Catalogue (HD) is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension (HDE), published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the Henry Draper Extension Charts (HDEC), published from 1937 to 1949 in the form of charts, which gave classifications for 86,933 more stars.

New!!: Mira and Henry Draper Catalogue · See more »

Hipparchus

Hipparchus of Nicaea (Ἵππαρχος, Hipparkhos), was a Greek astronomer, geographer, and mathematician.

New!!: Mira and Hipparchus · See more »

Hipparcos

Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.

New!!: Mira and Hipparcos · See more »

History of China

Written records of the history of China can be found from as early as 1200 BC under the Shang dynasty (c. 1600–1046 BC).

New!!: Mira and History of China · 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!!: Mira and Hubble Space Telescope · See more »

Infrared

Infrared (IR) is invisible radiant energy, electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 700 nanometers (frequency 430 THz) to 1 mm (300 GHz) (although people can see infrared up to at least 1050 nm in experiments).

New!!: Mira and Infrared · See more »

Interstellar medium

In astronomy, the interstellar medium (ISM) is the matter that exists in the space between the star systems in a galaxy.

New!!: Mira and Interstellar medium · See more »

Ismaël Bullialdus

Ismaël Bullialdus (1605–1694) was a famous astronomer and mathematician during the seventeenth century.

New!!: Mira and Ismaël Bullialdus · See more »

Johannes Hevelius

Johannes Hevelius Some sources refer to Hevelius as Polish.

New!!: Mira and Johannes Hevelius · See more »

Johannes Phocylides Holwarda

Johannes Phocylides Holwarda (Jan Fokkesz, Jan Fokker, Johann Holwarda, Johannes Fokkes Holwarda, Jan Fokkens Holwarda, Jan Fokkes van Holwerd) (February 19, 1618—January 22, 1651) was a Frisian astronomer, physician, and philosopher.

New!!: Mira and Johannes Phocylides Holwarda · See more »

Jupiter

Jupiter is the fifth planet from the Sun and the largest planet in the Solar System.

New!!: Mira and Jupiter · See more »

Karl Manitius

Karl Manitius (23 July 1899 – 26 December 1979) was a German historian.

New!!: Mira and Karl Manitius · See more »

Light curve

In astronomy, a light curve is a graph of light intensity of a celestial object or region, as a function of time.

New!!: Mira and Light curve · See more »

Light-year

A light-year (abbreviation: ly), sometimes written light year, is a unit of length used informally to express astronomical distances.

New!!: Mira and Light-year · See more »

List of stars in Cetus

This is the list of notable stars in the constellation Cetus, sorted by decreasing brightness.

New!!: Mira and List of stars in Cetus · See more »

Main sequence

In astronomy, the main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness.

New!!: Mira and Main sequence · See more »

Margin of error

The margin of error is a statistic expressing the amount of random sampling error in a survey's results.

New!!: Mira and Margin of error · See more »

Mercury (planet)

Mercury is the smallest and closest to the Sun of the eight planets in the Solar System, with an orbital period of about 88 Earth days.

New!!: Mira and Mercury (planet) · See more »

Mira B

Mira B, also known as VZ Ceti, is the companion star to the variable star Mira.

New!!: Mira and Mira B · See more »

Mira variable

Mira variables, named after the prototype star Mira, are a class of pulsating variable stars characterized by very red colours, pulsation periods longer than 100 days, and amplitudes greater than one magnitude in infrared and 2.5 magnitude at visual wavelengths.

New!!: Mira and Mira variable · See more »

NASA

The National Aeronautics and Space Administration (NASA) is the United States government agency responsible for the civilian space program as well as aeronautics and aerospace research.

New!!: Mira and NASA · See more »

Orbital period

The orbital period is the time taken for a given object to make one complete orbit around another object.

New!!: Mira and Orbital period · See more »

Planetary nebula

A planetary nebula, often abbreviated as PN or plural PNe, is a kind of emission nebula consisting of an expanding glowing shell of ionized gas ejected from old red giant stars late in their lives.

New!!: Mira and Planetary nebula · See more »

Protoplanetary disk

A protoplanetary disk is a rotating circumstellar disk of dense gas surrounding a young newly formed star, a T Tauri star, or Herbig Ae/Be star.

New!!: Mira and Protoplanetary disk · See more »

Ptolemy

Claudius Ptolemy (Κλαύδιος Πτολεμαῖος, Klaúdios Ptolemaîos,; Claudius Ptolemaeus) was a Greco-Egyptian writer of Alexandria, known as a mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology.

New!!: Mira and Ptolemy · See more »

Red giant

A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses) in a late phase of stellar evolution.

New!!: Mira and Red giant · See more »

Smithsonian Astrophysical Observatory

The Smithsonian Astrophysical Observatory (SAO) is a research institute of the Smithsonian Institution headquartered in Cambridge, Massachusetts, where it is joined with the Harvard College Observatory (HCO) to form the Harvard–Smithsonian Center for Astrophysics (CfA).

New!!: Mira and Smithsonian Astrophysical Observatory · See more »

Solar irradiance

Solar irradiance (also Insolation, from Latin insolare, to expose to the sun) is the power per unit area produced by the Sun in the form of electromagnetic radiation.

New!!: Mira and Solar irradiance · See more »

Solar mass

The solar mass is a standard unit of mass in astronomy that is used to indicate the masses of other stars, as well as clusters, nebulae and galaxies.

New!!: Mira and Solar mass · See more »

Star

A star is a luminous sphere of plasma held together by its own gravity.

New!!: Mira and Star · See more »

Star catalogue

A star catalogue, or star catalog, is an astronomical catalogue that lists stars.

New!!: Mira and Star catalogue · See more »

Stellar classification

In astronomy, stellar classification is the classification of stars based on their spectral characteristics.

New!!: Mira and Stellar classification · See more »

Stellar wind

A stellar wind is a flow of gas ejected from the upper atmosphere of a star.

New!!: Mira and Stellar wind · See more »

Sun

The Sun (in Greek: Helios, in Latin: Sol) is the star at the center of the Solar System and is by far the most important source of energy for life on Earth.

New!!: Mira and Sun · See more »

Supernova

A supernova is a stellar explosion that briefly outshines an entire galaxy, radiating as much energy as the Sun or any ordinary star is expected to emit over its entire life span, before fading from view over several weeks or months.

New!!: Mira and Supernova · See more »

Tycho Brahe

Tycho Brahe, born Tyge Ottesen Brahe (14 December 154624 October 1601), was a Danish nobleman known for his accurate and comprehensive astronomical and planetary observations.

New!!: Mira and Tycho Brahe · See more »

Ultraviolet

Ultraviolet (UV) light is an electromagnetic radiation with a wavelength from 400 nm to 100 nm, shorter than that of visible light but longer than X-rays.

New!!: Mira and Ultraviolet · See more »

Ulugh Beg

Mīrzā Muhammad Tāraghay bin Shāhrukh (میرزا محمد طارق بن شاہ رخ, میرزا محمد تراغای بن شاہ رخ) better known as Ulugh Beg (March 22, 1394 in Sultaniyeh, Persia – October 27, 1449, Samarkand) was a Timurid ruler as well as an astronomer, mathematician and sultan.

New!!: Mira and Ulugh Beg · See more »

Variable star

A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates.

New!!: Mira and Variable star · See more »

White dwarf

A white dwarf, also called a degenerate dwarf, is a stellar remnant composed mostly of electron-degenerate matter.

New!!: Mira and White dwarf · See more »

Redirects here:

Mira Ceti, O Ceti, O ceti, Omicron Ceti.

References

[1] https://en.wikipedia.org/wiki/Mira

OutgoingIncoming
Hey! We are on Facebook now! »