This gas needs an enormous amount of energy to shine — more than normal stars can supply. The discovery, based on data from ...

NASA has unveiled four new images of the cosmos, featuring Mars, two nebulae, and a distant spiral galaxy. These images were ...

In a close-up of the Rosette Nebula — a stellar nursery 5,200 light-years away — dark clouds of gas and dust are seen being carved by radiation from massive stars. A young star at the upper right is ...