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.

Friday, May 2, presents a perfect opportunity to catch the mighty ice giant Neptune close to the planets Saturn and Venus in ...

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.

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

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

An international team used 40 years' worth of data from two space probes to track down what they believe are signs of this ...

Now, new data show that this is a world like nothing seen before. Using cutting-edge instruments on the Telescopio Nazionale ...

Amazon’s first batch of internet satellites rocketed into orbit Monday, the latest entry in the mega constellation market ...

Earth" planet was discovered by researchers. It is not believed these planets are more common than previously thought.

Sauk Prairie will get a glimpse of one of the two eclipses that will occur over the next thirty days. The total solar eclipse ...