Zipping toward Earth at around 20,000 miles per hour, the asteroid is due to make its closest approach on Tuesday.

It is with a heavy heart that I announce that NASA Earth Science Communications has directed The Earth Observer to conduct an ...

On some Mars images, Olympus Mons does not look dramatic at first glance. It sits there quietly, a wide pale rise against ...

The night sky is about to put on its first big show of the year, giving skywatchers a reason to look up and linger.The first ...

NASA has set a date for a return to the Moon, as part of the U.S. space agency’s ambitious Artemis program.

Winter often feels like a long stretch of weak light and cold air. The idea that Earth is actually closest to the Sun during ...

The Artemis II mission, which could launch as early as February, is expected to send four astronauts on a trip to the moon, ...

Our 24-hour day measures Earth’s rotation relative to the Sun, known as a solar day. This is slightly longer than Earth’s ...

Europa has a vast, saltwater ocean beneath its icy shell, with more than twice the amount of water in all of Earth’s oceans ...

Kicking off the year’s cosmic wonders is the moon, drawing the first astronauts to visit in more than 50 years as well as a ...

NASA is edging toward a milestone it has not attempted in more than half a century: sending astronauts around the moon on a ...

Here are seven of the most beautiful interacting galaxy images captured by NASA Hubble Space Telescope, showcasing the ...