New images of the Butterfly Nebula and the Jewel Bug Nebula taken by the NASA/ESA Hubble Space Telescope are revealing information about how planetary...
Planetary nebulae, whose stars shed their layers over thousands of years, can turn into crazy whirligigs while puffing off shells and jets of hot gas....
When the Universe was still very young, only a few kinds of atoms existed. Astrophysicists believe that around 100,000 years after the Big Bang, ionized...
