Category
page 1Stars
star
A star is a luminous spheroid of plasma held together by self-gravity. The nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light. The most prominent stars have been categorised into constellations and asterisms, and many of the brightest stars have proper names. Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations. The observable universe contains an estimated to stars. Only about 4,000 of these stars are visible to t
NGC 1988
galaxy
Q1124767
galaxy
star designation
process by which the IAU names stars
NGC 4768
galaxy
NGC 1443
star in the constellation Eridanus
substellar object
astronomical object with insufficient mass to sustain nuclear fusion
Portal:Star
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