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A sphere of gas massive enough to generate light and heat through nuclear reactions that transform hydrogen into helium in its core.
Star whose mass is not sufficient to generate a nuclear reaction.
Star whose mass is sufficient to generate a nuclear reaction.
Expanding gaseous envelope that corresponds to the external layer of a red giant that is gradually fading away.
Dead star, likely the residue of a dwarf that has totally exhausted its energy resources.
Stars whose mass is less than 1.5 times that of the Sun.
An old star whose hydrogen reserve has been exhausted; its luminosity can be 100 times that of the Sun.
An old, extremely dense star of faint luminosity, formed by the nucleus of a red giant contracting until it reaches the size of Earth.
A white dwarf that assimilates gaseous matter from a neighboring star, suddenly becoming extremely bright before it returns to its initial brightness.
Stars whose mass is more than 1.5 times that of the Sun; can be up to 50 times the mass of the Sun.
An old, extremely luminous star of considerable mass; its diameter can be as much as 100 times that of the Sun.
Star formed of compressed neutrons, believed to be the residue of a supernova explosion.
A supergiant that collapses onto itself and explodes with such force that it releases more energy than millions of suns.
A neutron star that rotates rapidly on itself, thereby emitting regular radio waves.
Results when the core of a massive star collapses; the gravitational force is so strong that not even light can escape.