An explosive fate awaits stars of less than about eight solar masses. Planetary nebulae are a type of supernova remnant formed when Sun-like stars first swell up to enormous sizes and then explode.

The Crab Nebula is a supernova remnant and pulsar wind nebula in the constellation of Taurus. The beautiful image was captured by NASA's Hubble Space Telesocop. The Eskimo Nebula, also known as the ...

A planetary nebula in Sagittarius, 3000 light-years away, features waves 100 billion kilometres high, caused by supersonic shocks from a hot star's stellar winds. Hubble's image of the Carina Nebula ...