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12 relations: Apparent magnitude, Binary star, Canis Minor, Constellation, Earth, Epoch (astronomy), Giant star, International Celestial Reference System, Light-year, Minute and second of arc, Stellar classification, University of Illinois at Urbana–Champaign.
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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Binary star
A binary star is a star system consisting of two stars orbiting around their common barycenter.
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Canis Minor
Canis Minor is a small constellation in the northern celestial hemisphere.
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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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Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
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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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Giant star
A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature.
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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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Light-year
The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.
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Minute and second of arc
A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.
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Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
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University of Illinois at Urbana–Champaign
The University of Illinois Urbana–Champaign (also known as U of I, Illinois, or colloquially as the University of Illinois or UIUC) is a public research university in the U.S. state of Illinois and the flagship institution of the University of Illinois System.
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