Stellar Objects

Binary star systems consist of two stars orbiting their common center of mass, gravitationally bound to each other.

A region of spacetime with extreme gravity.

Blue giants are massive, hot, luminous stars on or near the main sequence with surface temperatures 10,000-50,000+ K.

Cepheid variables are luminous pulsating stars with periods of 1-100 days, exhibiting a precise relationship between pul...

Globular clusters are ancient, spherical concentrations of 100,000-1 million stars, tightly gravitationally bound and or...

A planetary nebula is a glowing shell of gas ejected by a dying low/medium-mass star, ionized by ultraviolet radiation f...

A protostar is the earliest stage of star formation, a dense core within a collapsing molecular cloud that has not yet i...

RR Lyrae stars are older, less luminous pulsating variables with periods 0.2-1 day, found in globular clusters and galac...

Red supergiants are the largest stars by volume, evolved massive stars (>8 solar masses) with radii up to 1,000-1,500 ti...

Supernova remnants (SNRs) are expanding shells of gas and magnetic fields produced by supernova explosions, observable f...

Variable stars are stars whose brightness changes over time, either intrinsically (physical changes) or extrinsically (e...

A white dwarf is the dense, hot remnant core of a low/medium-mass star (0.5-8 solar masses) that has shed its outer laye...