Scientists using NASA's Fermi Space Telescope have detected antimatter produced above thunderstorms on Earth, a phenomenon never seen before.
An unusual, ghostly green blob of gas dubbed Hanny's Voorwerp (Hanny's Object in Dutch) appears to float near a normal-looking spiral galaxy.
A deep survey of more than 200,000 stars in our Milky Way galaxy has unveiled the sometimes petulant behavior of tiny red dwarf stars.
a team of NASA and European scientists recorded the "fingerprints" of mystery molecules - thought to be large organic compounds - in two distant galaxies, Andromeda and the Triangulum.