For observers in India, Neptune will be visible throughout most of the night on September 20-21, rising in the east just as ...

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 ...

R esearchers looking for objects in the Kuiper Belt – the donut-shaped region beyond the orbit of Neptune containing icy ...

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

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

The outer Solar System has been a treasure trove of discoveries in recent decades. Using ground-based telescopes, astronomers ...

Our solar system might still bear the scars from an extremely close shave with an alien star. Such an encounter – the closest pass we know of – would have shaken up objects on the outskirts and might ...

Scientists have used data from a long-retired NASA Dawn spacecraft to solve the mystery surrounding the origins of the ...

Ceres, the largest object in the asteroid belt between Mars and Jupiter, has long puzzled scientists about its origins. With ...

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

The outer solar system is home to thousands of smaller celestial bodies beyond Neptune. Many of these objects have peculiar ...

Ceres is an iconic dwarf planet shown in the TV series The Expanse and has gained fame in the real world as well because of ...