A star's initial mass determines its fate. Select a mass with the slider and watch the star's evolution — from nebula to protostar to main sequence and on to white dwarf, neutron star, or black hole — simulated with Canvas animations. Real astronomical data and key facts accompany each stage.
Stars are born in nebulae — enormous clouds of gas and dust. Gravity pulls the gas inward, and over millions of years, the contraction begins.
Stars are born in nebulae — enormous clouds of gas and dust. Gravity pulls the gas inward, and over millions of years, the contraction begins.