In the Halo universe, the biggest threat is an alien hegemony called the Covenant. Who are they and what do they want?

At least 50 billion planets in our own Milky Way galaxy are ... How typical is the Orion Trapezium cluster? Very typical, there are thousands of such regions in the galaxy, says Portegies Zwart.

and you may catch a hazy ark of light stretching from horizon to horizon—the spiral arms of our own Milky Way galaxy. Good luck with that. With light pollution getting worse with every passing ...

Our solar system resides in a galaxy called the Milky Way, stuffed with between 100 billion and 400 billion other stars, many of them with planets of their own. The Milky Way got its name from the ...

A new view of the Milky Way: Warped and twisted Our galaxy, the Milky Way, is "warped and twisted" and not flat as previously thought, new research shows. Analysis of the brightest stars in the ...

Grand-design spiral galaxies are characterized by their prominent, well-defined arms, which circle ... to that of the Milky Way, which is relatively high for a galaxy that formed within one ...

Galaxies are much bigger than we originally thought, extending far out into deep space — so far that the Milky Way likely interacts with our closest neighbor, Andromeda."You may think it's a ...

An astronomical detector buried in Antarctic ice has provided a view of our Galaxy that has never been seen before. The blurry, extraordinary image is of the Milky Way, but it is composed of the ...