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.

This image features a deep field view of the Cassiopeia constellation immersed in the glow of ionized hydrogen gas, where the ...

Bring the Moon and planets into closer view, spot stunning star clusters and observe distant galaxies and nebulas with your ... and he told Live Science "The general rule of thumb is to use ...