Mercury takes only 88 Earth days to orbit the sun.

A new study examines how much material from the closest star system to Earth will end up in orbit around the Sun, and how ...

"We were very surprised to see that the same tiny plasma jets appear to be driving both the fast and the slow solar wind." ...

But of these planets, which is nearest to the sun ... Because Mercury rotates so slowly — once every 58 Earth days — in some places, the sun can appear overhead for weeks at a time.

Keep your eye on the ball” is a motto for many athletes—and for astronomers trying to find Earth-threatening space rocks ...

Over the next several weeks, astronomers will be looking closely at an asteroid called 2024 YR4 that could be as big as a ...

The $10 billion orbiting observatory will give astronomers a better sense of the near-Earth asteroid 2024 YR4's size and ...

"We are the first mission to be able to track space weather events in three dimensions routinely across the solar system." ...

YR4 has a 2% chance of hitting Earth in 2032. Astronomers are tracking it to refine estimates of its size and orbit to see how much of a risk the space rock poses.

An asteroid could potentially crash into Earth in less than eight years. Here's everything to know about asteroid 2024 YR4.

Scientists say the threat of a newly discovered asteroid has risen slightly in the past few weeks as the world's telescopes ...