This month, 99 runners from around the globe embarked on a grueling 135-mile competition from the lowest point below sea ...

Alone among known planets, Earth has vast oceans on its surface and its landmasses are marked with lakes and extensive river ...

Our circumstances here on the wondrous, life-supporting Earth can give us a false understanding of what the universe is ...

Earth's largest waterfall, Denmark Strait cataract, is located in Arctic waters between Iceland and Greenland and is roughly ...

A new gas giant world discovered by citizen scientists using data from NASA's exoplanet-hunting spacecraft TESS is cool, literally and figuratively.

But in space or on the Moon, there are no power lines, no sunlight at night and no backup grid. Every system — from life ...

Although the Earth’s distance from the Sun does not affect the seasons, aphelion does influence the length of summer in the Northern Hemisphere.

Astronomers have discovered an Earth-sized exoplanet, TOI-2431 b, on a death spiral. The planet orbits its star in just five hours and 22 minutes, making it an exoplanet with one of the shortest orbit ...

NASA has discovered an interstellar comet that's wandered into our backyard. The space agency spotted the object with the Atlas telescope in Chile earlier this week, and has confirmed it was a ...

New interstellar comet will keep a safe distance from Earth, NASA says NASA has discovered an interstellar comet that's wandered into our backyard ...

CAPE CANAVERAL, Fla. (AP) — NASA has discovered an interstellar comet that's wandered into our backyard.