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.

Astronomers have detected mysterious X-ray signals coming from a nearby white dwarf star for more than 40 years. We may now ...

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 ...

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 ...