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

Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, ...

Hubble discovered a white dwarf planet devouring a Pluto-like object, revealing debris rich in water and nitrogen.

Normally when a medium-size star dies, it blasts away the bulk of material in its system. The Hubble discovery was surprising ...

Earth has a newly-discovered neighbor in the solar system. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

Methane gas may signal an atmosphere or geological activity on a distant dwarf planet located at the outer edge of the Solar System. A research team led by the Southwest Research Institute has ...

By studying the chemical composition of an odd, dying star, astronomers discovered that it had been feasting on what used to ...

Simultaneously cooling Pluto while energizing atmospheric molecules to allow them to escape into space, Pluto's haze plays a key role in the planet's energy balance.

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 ...

Eight years after being reduced to a "dwarf planet" by the International Astronomical Union in 2006, our far distant cousin is finally getting some real push to be upgraded back to the ninth "planet" ...

A Southwest Research Institute-led team has reported the first detection of gas on the distant dwarf planet Makemake, using ...