Catch some morning meteors, see the Moon reach First Quarter, and watch Mars visit the Beehive in the sky this week.

Using two infrared space telescopes and a 23-year gap, scientists may have spotted a mysterious, slow-moving object beyond ...

The presence of another planet in the solar system could explain the odd movements of some of the bodies in the Kuiper Belt.

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

Astronomers have detected a promising sign of a ninth planet lurking at the the farthest reaches of the Solar System.

Jupiter and Mars shine in the evening, more planets gather in the morning, and the Eta Aquariid meteors join in.

The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

A Harvard professor questions whether research conducted at the University of Cambridge about life on K2-18b is accurate.

A rare and dramatic scene unfolds 140 light-years from Earth. A rocky planet, once whole, is now crumbling to dust under the ...

May’s night sky is packed with astronomical events—find out when and where to look for meteor showers, ancient star clusters, ...

A team of astronomers poring through old astronomical data may have seen a candidate for the elusive Planet Nine – a ...

Elusive planet could be surrounded by up to 20 hot MOONS, study claims Astronomers have found new evidence that a mysterious ...