The nebula is possibly being produced by a type of unstable star called a Wolf–Rayet star.

Two aging stars in the binary system AFGL 4106 sculpt a glowing, egg-shaped nebula as they approach the end of their lives.

When you look up at the night sky, it appears unchanging. But if you look deep enough you will find that the sky is in fact ...

Water ice on Mars, bubbling gas on a distant star, a snow-covered island, and a pre-planetary nebula are featured this week. Plus, a look back at an image of Mars taken by the Dawn spacecraft during a ...