A new look through decades-old data has unveiled some of the most compelling evidence yet of a hidden ninth planet in the far ...

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.

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

For over a century, astronomers have wondered if there's an extra planet in our Solar System that we haven't been able to see ...

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

According to the data, the object is situated between 46.5 billion and 65.1 billion miles from Earth — about 14 times farther ...

Astronomers have been trying to discover evidence that worlds exist around stars other than our Sun since the 19th century.

Venus dominates as the brilliant “Morning Star” in the east-southeast before dawn; the Eta Aquariid meteor shower takes place ...

Bright stars visible during May mornings include Arcturus in the west; Vega nearly overhead; with nearby Altair and Deneb completing the Summer Triangle; Antares in the southwest; and Fomalhaut rising ...

A team of astronomers claims to have sniffed out a “biosignature” in the atmosphere of a distant planet called K2-18b. But ...

Celestial Insights Are Back! I am happy to be returning to the blog after a whirlwind of retrogrades and eclipse season ...