Meanwhile, the core becomes a stellar remnant: a white dwarf, a neutron star, or if it is sufficiently massive a black hole.
Binary and multi-star systems consist of two or more stars that are gravitationally bound and generally move around each other in stable orbits.
The remainder of the star's interior carries energy away from the core through a combination of radiative and convective heat transfer processes.William Herschel was the first astronomer to attempt to determine the distribution of stars in the sky.During the 1780s, he established a series of gauges in 600 directions and counted the stars observed along each line of sight.The star's internal pressure prevents it from collapsing further under its own gravity.
A star with mass greater than 0.4 times the Sun's will expand to become a red giant when the hydrogen fuel in its core is exhausted.
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity. Many other stars are visible to the naked eye from Earth during the night, appearing as a multitude of fixed luminous points in the sky due to their immense distance from Earth.