The Milky Way hosts at least 17 billion Earth-size alien planets, and probably many more, a new study reveals. Astronomers have determined that about 17 percent of stars in our galaxy harbor a roughly ...

Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET. When not wallowing in weird gear and iPad apps for cats, she can be found tinkering with her 1956 DeSoto. Most ...

This story was updated at 1:55 p.m. EST. The Milky Way hosts at least 17 billion Earth-size alien planets, and probably many more, a new study reveals. Astronomers have determined that about 17 ...

Our Milky Way is home to at least 17 billion planets that are similar in size to Earth, a new estimate suggests. That's more than two Earth-size planets for every person on the globe.Just how many are ...

This image provided by the European Space Agency ESA, is Gaia’s all-sky view of our Milky Way Galaxy and neighboring galaxies, based on measurements of nearly 1.7 billion stars. The map shows the ...

NASA's Hubble Space Telescope has captured a stunning new image of a galaxy that's over twice the size of our Milky Way. According to NASA, the gigantic elliptical galaxy (dubbed NGC 474) sits about ...

Microquasars in our Milky Way galaxy have emerged as the most extreme particle engines, accelerating cosmic rays to ...

Computer simulations and observations of nearby galaxies helped astrophysicists determine that the Milky Way stretches nearly 2 million light-years across, Ken Croswell reported in “Astronomers find ...

Geraint Lewis receives funding from the Australian Research Council. Prajwal Kafle does not work for, consult, own shares in or receive funding from any company or organization that would benefit from ...

When Peter Predehl, an astrophysicist at the Max Planck Institute for Extraterrestrial Physics in Germany, first laid eyes on the new map of the universe’s hottest objects, he immediately recognized ...

The Andromeda galaxy, the closest to the Milky Way, might be more of a lightweight than astronomers thought. Previous measurements have put Andromeda’s mass at about twice that of the Milky Way, ...

Existing information about the spiral Andromeda galaxy may not be accurate anymore. A new study has reduced the size of Milky Way's neighboring galaxy. In a pre-published study, Astronomers from the ...