The studies - both published in Icarus - look at something astronomers already knew: that Eris and Makemake, the second and fourth largest dwarf planets in our solar system, contain a lot of methane.

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 ...

This is both the largest sample of dwarf galaxies with active black holes ever seen and the largest haul of elusive intermediate-mass black holes ever collected. The data could help scientists ...

Some measure hundreds of kilometres across. The largest object is the asteroid belt is the dwarf planet Ceres, which is 950km in diameter (that's about the same the length as Great Britain).

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 ...