9 relations: Apparent magnitude, Constellation, Epoch (astronomy), Giant star, Grus (constellation), International Celestial Reference System, Star, Stellar classification, Stellar evolution.
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.
New!!: Xi Gruis and Apparent magnitude · See more »
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.
New!!: Xi Gruis and Constellation · 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!!: Xi Gruis and Epoch (astronomy) · See more »
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.
New!!: Xi Gruis and Giant star · See more »
Grus (constellation)
Grus (or colloquially) is a constellation in the southern sky.
New!!: Xi Gruis and Grus (constellation) · See more »
International Celestial Reference System
The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).
New!!: Xi Gruis and International Celestial Reference System · See more »
Star
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
New!!: Xi Gruis and Star · See more »
Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
New!!: Xi Gruis and Stellar classification · See more »
Stellar evolution
Stellar evolution is the process by which a star changes over the course of time.
New!!: Xi Gruis and Stellar evolution · See more »