Star Tracks Tuesday February 13 2018

The amount of material in a star (its mass) is so huge that a nuclear reaction called nuclear fusion goes on inside it. This reaction changes hydrogen to helium and gives off heat. These large, swelling stars are known as red giants.

A star is a luminous spheroid of plasma held together by self-gravity. [1] the nearest star to earth is the sun. Many other stars are visible to the naked eye at night; Their immense distances. Indystar provides the latest news, sports, weather, and entertainment updates for indianapolis and indiana residents.