Brown Dwarf
An artist's impression of a Brown Dwarf
Credit: NASA/JPL-Caltech
Credit: NASA/JPL-Caltech
In partnership with the Dill Faulkes Educational Trust
All stars form in nebulae, which are huge clouds of gas and dust. Though they shine for many thousands, and even millions of years, stars do not last forever. The changes that occur in a star over time and the final stage of its life depend on a star's size.
The light and heat from stars is made by a process called nuclear fusion.