Summer 2015 was marked by a unique astronomical event, which occurs approximately once in the history of astronomy. The New ...

"Makemake is one of the largest and brightest icy worlds beyond Neptune, and its surface is dominated by frozen methane," ...

In Roman mythology, Pluto is the god and ruler of the dead. For a return mission to the dwarf planet, Howett and her colleagues opted for the name Persephone, after Pluto's wife and "queen of the ...

Two of Pluto's midsize moons may be made of the guts of its largest moon, Charon, new research suggests.