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22 relations: Absolute magnitude, Apparent magnitude, Beehive Cluster, Cancer (constellation), Constellation, Corona, Coronal loop, Epoch (astronomy), Flare star, Gliese Catalogue of Nearby Stars, Harvard University, Hertzsprung–Russell diagram, International Celestial Reference System, Luminosity, Main sequence, Radial velocity, ROSAT, Star catalogue, Stellar atmosphere, Stellar classification, Sun, Thick disk.
Absolute magnitude
Absolute magnitude is a measure of the luminosity of a celestial object, on a logarithmic astronomical magnitude scale.
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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.
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Beehive Cluster
The Beehive Cluster (also known as Praesepe (Latin for "manger"), M44, NGC 2632, or Cr 189), is an open cluster in the constellation Cancer.
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Cancer (constellation)
Cancer is one of the twelve constellations of the zodiac.
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Constellation
A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.
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Corona
A corona (Latin, 'crown') is an aura of plasma that surrounds the Sun and other stars.
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Coronal loop
Coronal loops form the basic structure of the lower corona and transition region of the Sun.
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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.
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Flare star
A flare star is a variable star that can undergo unpredictable dramatic increases in brightness for a few minutes.
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Gliese Catalogue of Nearby Stars
The Gliese Catalogue of Nearby Stars is a modern star catalogue of stars located within 25 parsecs (81.54 ly) of the Earth.
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Harvard University
Harvard University is a private Ivy League research university in Cambridge, Massachusetts.
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Hertzsprung–Russell diagram
The Hertzsprung–Russell diagram, abbreviated H–R diagram, HR diagram or HRD, is a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.
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International Celestial Reference System
The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).
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Luminosity
In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object.
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Main sequence
In astronomy, the main sequence is a continuous and distinctive band of stars that appear on plots of stellar color versus brightness.
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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.
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ROSAT
ROSAT (short for Röntgensatellit, in German X-rays are called Röntgenstrahlen, in honour of Wilhelm Röntgen) was a German Aerospace Center-led satellite X-ray telescope, with instruments built by West Germany, the United Kingdom and the United States.
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Star catalogue
A star catalogue (Commonwealth English) or star catalog (American English), is an astronomical catalogue that lists stars.
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Stellar atmosphere
The stellar atmosphere is the outer region of the volume of a star, lying above the stellar core, radiation zone and convection zone.
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Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
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Sun
The Sun is the star at the center of the Solar System.
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Thick disk
The thick disk is one of the structural components of about 2/3 of all disk galaxies, including the Milky Way.
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References
[1] https://en.wikipedia.org/wiki/AZ_Cancri
