The findings have revealed a lot about Ceres' origin. The dwarf planet stands out from all the others in the asteroid belt.
Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary ...
Together, dwarf planets can help scientists learn a lot ... 2015 RR245 is catalogued as the "18th largest" object in the Kuiper belt, according to the Minor Planet Center, the organization ...
But the biggest confusion comes with the subtypes of the non-planets. If an object is large enough to make itself round but ...
About 650 light-years from here, in the constellation Aquarius, lies the planetary nebula Caldwell 63, commonly known as the ...
Pluto, discovered in 1930, was once considered the ninth planet in our solar system. In 2006, the International Astronomical Union reclassified Pluto as a dwarf planet because it doesn't meet all ...
For more information on the biggest astronomical events of 2025, check out our celestial calendar. Pluto was reclassified from a planet to a dwarf planet by the International Astronomical Union ...