This week is the best time in May to view the night sky. Here's everything you can see during May's dark skies, from an upside-down bear to some of the oldest stars in the universe.

Astronomers have developed a computer simulation to explore, in unprecedented detail, magnetism and turbulence in the ...

Getting ...

In photos The details in this photograph include the airglow of the atmosphere dividing Earth from space — yellow-green at an altitude of 75 miles and a faint reddish hue 250 miles above the ...

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

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

Did you know that the sun is up for more hours this month than in August? August is summertime, and May is still spring, so it may not seem quite right.

Often depicted standing over her brother Geb, the Earth ... the Milky Way, which the Egyptians saw as cleaving the sky in two ...

The first image of the whole Earth from space came in 1972, when astronauts Ron Evans or Harrison Schmitt took a photo from ...

Listen to Story Nasa researchers looked closely at the mysterious structure It revealed the presence of a break, or fracture The fracture is likely caused by a pulsar Astronomers have discovered a ...

but the new definition of a planet requires the celestial body to have enough gravity to clear its orbital path from other bodies. MORE: Binary star system found near the Milky Way's black hole ...

Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar system was touted more than a century ago. But ...