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16 relations: Apparent magnitude, Constellation, Effective temperature, Giant star, Hydrogen, Perseus (constellation), Photosphere, Red giant, Solar luminosity, Solar mass, Solar radius, Star, Stellar classification, Stellar evolution, Stellar parallax, Subgiant.
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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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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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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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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Hydrogen
Hydrogen is a chemical element with symbol H and atomic number 1.
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Perseus (constellation)
Perseus is a constellation in the northern sky, being named after the Greek mythological hero Perseus.
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Photosphere
The photosphere is a star's outer shell from which light is radiated.
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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.
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Solar luminosity
The solar luminosity,, is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.
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Solar mass
The solar mass is a standard unit of mass in astronomy, equal to approximately.
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Solar radius
Solar radius is a unit of distance used to express the size of stars in astronomy.
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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 parallax
Stellar parallax is the apparent shift of position of any nearby star (or other object) against the background of distant objects.
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Subgiant
A subgiant is a star that is brighter than a normal main-sequence star of the same spectral class, but not as bright as true giant stars.
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