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 ...

In 2026, there will be journeys to the moon and Mars, new visions of the cosmos and a solar eclipse that might be worth ...

NASA is making final preparations for two spacewalks at the International Space Station (ISS). It’s been eight long months ...

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

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

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

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 ...

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 ...

A NOAA forecast suggests that Northern Lights may be visible in northern U.S. states on New Year’s Eve and New Year’s Day ...