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 ... .</ ...

For instance, Neptune migrated outward, switching places with Uranus, and pushed a lot of the small, icy bodies into the Kuiper Belt, a place in the outer solar system that’s home to dwarf planets ...

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

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

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...

Brown’s discovery of Eris, an icy world in the Kuiper Belt beyond Pluto, led to the reclassification of Pluto as a dwarf planet. He has been dubbed the “Pluto Killer.” In 2016, he expressed ...

But most critically, as Jupiter settled into its own orbit, it moved all of the forming objects and likely finalized the location of the remaining inner planets, including Earth. All of Jupiter ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

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 ...

The two space surveys, conducted 23 years apart, could show how a secret planet orbits. Since the demotion of Pluto to dwarf planet ... educated guess about the location of the long-theorized ...

Every year, Earth follows a familiar pattern of seasonal changes: As summer rolls around in the Northern Hemisphere, winter creeps in in the Southern Hemisphere, and vice versa. But do other ...