The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

Scientists using a telescope in Hawaii have discovered a never-before-seen dwarf planet lurking ... Space.com for about 2.5 years before joining Mashable to cover all things outer space.

After tracking a puzzling X-ray signal from a dying star for decades, astronomers may have finally explained its source: The old star might have destroyed a nearby planet. Dating back to 1980, X ...