These large, swelling stars are known as red giants. But there are different ways a star's life can end, and its fate depends on how massive the star is. A star is a luminous spheroid of plasma held together by self-gravity.

Many other stars are visible to the naked eye at night; Their immense distances. A star is a huge sphere of very hot, glowing gas. Stars produce their own light and energy by a process called nuclear fusion. Fusion happens when lighter elements are forced to become.

Star Tracks: Tuesday, October 8, 2019

Fusion happens when lighter elements are forced to become.

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