Scientists have used Chandra to make a detailed study of an enormous cloud of hot gas enveloping two large, colliding galaxies. This unusually large reservoir of gas contains as much mass...

Magnetic field measurement techniques have long enabled scientists to probe the internal structure of biological and material samples. For example, magnetic resonance imaging (MRI) provid...

"We’ll be able to see the beginning of the universe as we know it today," says Charles Alcock, director of the Harvard-Smithsonian Center for Astrophysics (CfA) and professor of astronomy...

Alex Dalgarno has been selected to receive the 2013 Franklin Institute Medal in Physics. Since 1824, the Franklin Institute has honored the greatest men and women of science, engineering,...

In the spring of the year 1006, one thousand and seven years ago this April, observers in China, Egypt, Iraq, Japan, Switzerland (and perhaps North America) reported seeing what might be ...

Cambridge, MA In our solar system, only one planet is blessed with an ocean: Earth. Our home world is a rare, blue jewel compared to the deserts of Mercury, Venus and Mars. But what if o...

The universe was created about fourteen billion years ago in a blaze of light known as the big bang. After about 380,000 years or so, once matter had cooled enough for neutral atoms (mos...

Collisions between galaxies are common. Indeed, most galaxies have probably been involved in one or more encounters during their lifetimes. One example is our own Milky Way, which is bou...

Cambridge, MA Spiral galaxies are some of the most beautiful and photogenic residents of the universe. Our own Milky Way is a spiral. Our solar system and Earth reside somewhere near one...

At some stage after its birth in the big bang, the universe began to make galaxies. No one knows exactly when, or how, this occurred. For that matter, astronomers do not know how the lin...