The Io–Jupiter system is similar, in scale, to an exoplanet orbiting an M-dwarf, and if volcanic Io ... magma oceans within other moons and planets. But new measurements from Juno, coupled ...

Ganymede, Jupiter's largest moon and the solar system's largest, is bigger than Mercury and the dwarf planet Pluto, with a diameter of 5,268 kilometers.

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

For over 40 years, astronomers have been puzzled by strange X-ray signals from the Helix Nebula’s white dwarf. Now, they may ...

Scientists using a telescope in Hawaii have discovered a never-before-seen dwarf planet lurking within the ring of icy bodies beyond the orbit of Neptune. The small new world -- temporarily named ...

A decades-old cosmic mystery may finally be solved. Scientists now suspect that the strange X-ray glow from a distant white ...

Florida Tech's Caldon Whyte is two years into a lengthy universe exploration to earn his Ph.D. in space sciences. After ...

Every 2.25 days, the planet which lies 35 light years away, completes a lap around its red dwarf sun ... on Earth and on Jupiter’s moon Io, is a telltale sign of active volcanoes.

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 ...

A blue atmosphere, smooth areas, and youthful mountain ranges - this dwarf planet is full of surprises. When NASA's New Horizons probe flew past Pluto in July 2015, the images it returned astonished ...