Scientists have identified an object about 435 miles (700 km) wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it as it travels on a highly ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

Earth has a new neighbor that lives far, far away. Scientists from the Institute for Advanced Study's School of Natural ...

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.

Curious Kids is a series for children of all ages. If you have a question you'd like an expert to answer, send it to ...

Curious Kids is a series for children of all ages ... icy bodies into the Kuiper Belt , a place in the outer solar system ...

Pluto was classified as a dwarf planet on August 24, 2006 at the International Astronomy Union (IAU) General Assembly. It was stripped of its planet status, under IAU Resolution 5A, ‘Definition ...

The Planet Earth and Moon in Orbit 42179 set measures ... Not only is it cool to watch, but it's also an excellent learning tool for kids; on the technical side, they get to see how a crankshaft ...

Today: Today is a great day to Get Intimate… Get Intimate with the Shrub-Steppe. This annual event organized by the Kittitas Environmental Education Network includes many outdoor educational ...

They lie about 250 astronomical units from a third brown dwarf, making the system even more complex. Adding a planet to this picture only deepens the mystery. The system belongs to the Argus ...

Exposure to extreme climate events will increase two to seven times more for those born in 2020 compared with those in 1960, a new study warns.