A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical Society in January 1925, a paper read by one of his ...

Add Yahoo as a preferred source to see more of our stories on Google. The Andromeda galaxy helped Edwin Hubble settle a great debate in astronomy. Stocktrek Images via Getty Images A hundred years ago ...

Inside the bright but unassumingly named nebula Gum 55 lies a dark nebula — a rift of dust grains that absorb visible light — creating a swatch of darkness against the glow of bright gas. Fittingly ...

Subscribe to our newsletter for the latest sci-tech news updates. In general, planetary nebulae (PNe) are expanding shells of gas and dust that have been ejected from a star during the process of its ...

Give them a constellation prize. A group of international scientists discovered three ultra-massive “Red Monster” galaxies capable of forming their own stars faster than the average nebula. The ...

The Large High Altitude Air Shower Observatory (LHAASO) has detected PeV (1015 eV) gamma-ray emission from a pulsar wind ...

A rare black moon will happen tonight Aug. 22-23. A seasonal black moon happens every 33 months. Since a black moon is a new moon, you might be able to spot the Milky Way and the dumbbell nebula. A ...

If you look at a photo of a face-on spiral galaxy, you'll notice spiral arms filled with glowing gas clouds, sparkling star ...

High above Earth, in the thin air of the Tibetan Plateau, a giant observatory ...

This article was originally featured on The Conversation. A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical ...