Over the past decade or so, astronomers have speculated about the characteristics of rogue planets in the Milky Way galaxy.

The word itself comes from galaktikós kyklos, or “milky circle,” the ancient Greek term for the Milky Way, our home galaxy.

A thin shell of air wraps around Earth, stretching about 20 miles above the surface. This invisible veil is packed with tiny ...

Apples-to-apples comparisons in the distant universe are hard to come by. Whether the subject is dwarf galaxies, supermassive black holes, or 'hot Jupiters,' astronomers can spend months or years ...

The universe is dying much sooner than scientists previously thought. But there's still going to be a long wait until then.

Astronomers used the Hubble Space Telescope to image "peculiar" galaxy Arp 184 (NGC 1961) about 190 million light-years away.

Warmer climates than Earth’s could accelerate life’s development, potentially increasing the number of planets with more ...

Jackie explains that a laser inside the tubes is split, bounces off mirrors, and goes straight back to sensors at the center ...