For nearly a century, astronomers have known that the universe is expanding. Most galaxies are carried outward with the flow ...

Astronomers may finally understand why planets orbiting two suns, the real-world equivalents of the "Star Wars" planet ...

Most of the universe is slipping away from the Milky Way, carried outward as space itself expands. Yet one giant neighbor is bucking the trend, racing straight at us while almost every other major ...

A vast, flat sheet of dark matter may solve the long-standing mystery of why our neighboring galaxy Andromeda is speeding ...

On a clear night, the Milky Way and the Andromeda galaxy look like close neighbors. In space, they really are.

Astronomers have produced the most detailed map yet of dark matter, revealing the invisible framework that shaped the Universe long before stars and galaxies formed. Using powerful new observations ...

Historically, the Andromeda Galaxy (M31) was a subject of extensive debate, initially considered a "nebulous smear" and later central to the "island universe" hypothesis proposing its status as an ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. The European Space Agency’s (ESA) Gaia space telescope has ...

Our Milky Way galaxy may not have a supermassive black hole at its center but rather an enormous clump of mysterious dark ...

When the billions of stars comprising the Milky Way, our home galaxy, appear especially vibrant as the band arcs across the night sky, it’s a photo op. Milky Way season, when the galaxy's bright ...

The Milky Way is our home galaxy with a disc of stars that spans more than 100,000 light-years. Though the Milky Way is generally always visible from Earth, certain times of year are better for ...