Jupiter" exoplanet called 2M1207b, precisely 20 years ago this week. This was the first direct visual confirmation of a world ...

The Vera C. Rubin Observatory could be key to discovering a ninth planet in our Solar System that has so far remained in ...

For years, astronomers have been hunting for Planet Nine, a hypothetical giant planet believed to be lurking at the far ...

IT is easy to feel like we know nothing about our universe, and unexplained stellar objects are the most puzzling feature of ...

Starstruck Billions of years ago, our Solar System may have had an incredibly close encounter with another passing star. As ...

The dwarf planet Ceres has a diameter of almost 1,000 kilometers and is located in the asteroid belt. In the television ...

Our Solar System has eight planets, a few dwarf planets and more than 200 moons. But wait. Are you seeing double? Or did ...

Brown, who is among the co-discoverers of Sedna, told the publication, “Some of our earlier hypotheses, before we realized ...

Do aliens sleep? You may take sleep for granted, but research suggests many planets that could evolve life don’t have a day ...

A star’s flyby likely altered the orbits of trans-Neptunian objects beyond Neptune that changes how we view the solar ...

Mexico, N.Y. – Malaki Sandejas, 8, loves a dwarf planet. Sitting next to his mom on their couch, he rattles off the five in our solar system. “The dwarf planets are Haumea, Makemake, Eris, Ceres and ...

Data from NASA's Dawn space probe calls into question assumptions about the origin of Ceres in the outer solar system. The ...