What is a Star? main content.

What is a Star?

What is a star_HERO AMNH/D. Finnin

Exhibition Text

An ordinary star is a massive sphere of luminous gas, mainly hydrogen and helium. A star’s heat and light derive from nuclear fusion in its core. During most of its life, a star is balanced between the inward pressure of its gravity and the outward pressure of its internal heat.

For Educators

Topic: Astronomy

Subtopic: Stars

Keywords: Astrophysics, Stars, Gravity, Hydrogen, Nuclear fusion, Helium, Stars--Temperature

Audience: General