Uranus is heating up from the inside. Uranus was always seen as a tilted, distant, and kind of boring world. Scientists used ...

The Andromeda galaxy is the galaxy next door, a very faint, fuzzy thing in the night sky, larger than a full moon. Textbooks claim it’s visible to the naked eye. Most of us have never noticed it. Too ...

Because Pluto is so dim, you need a telescope to see it. “A backyard telescope could do it under the right conditions,” says Grundy. Or you could visit a local observatory and use one of their ...

Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.

Astronomers have achieved a first in exoplanet hunting by using the Hubble Space Telescope images to investigate a mysterious event that could reveal the existence of a "rogue planet" drifting through ...

Astronomers have been trying to detect atmospheres on planets orbiting TRAPPIST-1, but bursts of radiation from the star make this challenging ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.

This article was originally featured on The Conversation. Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A ...

Additionally, Nichols said his team simultaneously studied the planet in ultraviolet light using the Hubble Space Telescope and saw a huge difference.

LONDON - Astronomers have for the first time managed to determine the color of a planet outside our solar system, a blue gas giant 63 light-years away.

The Hubble Space Telescope "opened a new window to the universe" when it launched into space. Now, 35 years later, NASA is releasing some stunning images to celebrate.

For 35 years, the Hubble Space Telescope has taken photos of celestial objects across the universe. Look back at 10 photos taken by the telescope orbiting above Earth's surface.