We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

Mars has lost immense amounts of water over it lifetime, and scientists aren't sure exactly how. New research hints that the ...

After a more challenging start to the year, a few astrological signs can rest assured knowing that the rest of the year will ...

NASA's leadership change comes at a pivotal moment for the agency, which is already bracing for potentially severe funding ...