The Milky Way and other galaxies in the universe harbor many young star clusters and associations that each contain hundreds to thousands of hot, massive, young stars known as O and B sta...

The space between stars is not empty. It contains copious but diffuse amounts of gas and dust; in fact about 5-10% of the total mass of our Milky Way galaxy is in interstellar gas. About ...

The most massive galaxies in the universe (as far as astronomers know) contain about five hundred billion solar-masses of material; our Milky Way galaxy, for comparison, has a total mass ...

Cambridge, MA One of the closest galaxies to the Milky Way almost got away with theft. However, new simulations convicted the Large Magellanic Cloud (LMC) of stealing stars from its neig...

A blazar is a galaxy with an intensely bright central nucleus containing a supermassive black hole, much like a quasar. The difference is that a blazar can emit light with extremely high ...

Scientists at the University of Arizona and in California have completed the most challenging large astronomical mirror ever made. For the past several years, a group of optical scientis...

Cambridge, MA - Most big galaxies fit into one of two camps: pinwheel-shaped spiral galaxies and blobby elliptical galaxies. Spirals like the Milky Way are hip and happening places, wi...

Quasars are among the most powerful energy sources known -- some are as luminous as one hundred thousand Milky Way galaxies. Astronomers know that quasars have massive black holes at the...

Dr. Margaret Geller has been awarded the 2013 Julius Edgar Lilienfeld Prize of the American Physical Society (APS). Established in 1988, the Lilienfeld Prize recognizes a most outstanding...

Almost thirty years ago the Infrared Astronomy Satellite, IRAS, discovered that the universe contained many fabulously luminous galaxies, some of them more than a thousand times brighter ...