Decades of constant X-ray emission from the Helix Nebula’s white dwarf suggest debris from a Jupiter-sized planet steadily rains upon the star.

When radioactive materials emit radiation, not only does it not glow green, it does not glow at all. Ionising radiation, ...

This stunning image features a deep field view of the Cassiopeia constellation where the two small planetary nebulas can be ...

DVC Glow in the Dark Loungefly Mini Backpack – $90 The ... classic shorts in front of a crescent moon, surrounded by tiny stars. “Disney Vacation Club Member” is embossed across the flap ...