New simulations reveal that the Milky Way’s odd split between two chemically distinct groups of stars isn’t a universal ...

When we think about orbits, we usually picture the Earth zooming around the sun. But does the sun just sit there? Or is it on its own journey? I asked my friend Guy Worthey. He’s a space scientist at ...

It can be hard to get your head around the fact that Earth is moving through space. But it is even stranger to realize that you are making two simultaneous journeys — around the sun and through the ...

In Part 2 of his story, Benita Albert tells of astronomer Bob Benjamin's career, including teaching and now being a NASA ...

New simulations of Milky Way-like galaxies reveal that the strange split between two chemically distinct groups of stars may ...

A Milky Way collision with a supermassive black hole might be closer than we thought. A potential collision between this hidden black hole and the Milky Way’s Sagittarius A could occur in two billion ...

A long-standing scientific belief holds that stars tend to hang out in the same general part of a galaxy where they originally formed. Some astrophysicists have recently questioned whether that is ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A collision between ...

Our status as milk-producing mammals would not be lost on intelligent aliens studying the history of our astronomy. The ancient Greeks, they would learn, described a milkiness in the night sky. And ...

So it’s confession time: I’ve been lying to you. I’ve said on many occasions that our Milky Way galaxy has a flat disk (like in this column or this one). But it’s not really flat—not even for a ...

Our solar system has been orbiting the Milky Way's black hole heart for 4.6 billion years. But it is hard to pin down exactly how many trips around the galaxy our sun has made during that time. When ...