Ariel, one of Uranus' icy moons, may once have concealed a vast ocean more than 100 miles (170 kilometers) deep beneath its frozen crust, according to new research. The findings add to growing ...

Our solar system is a wonder, from the star at the center to the planets and moons in orbit, as seen in these fantastic pictures taken by Hubble, the Solar Dynamics Observatory, and the Mars ...

A paper from NASA scientists and other researchers explores whether an asteroid with a 4% chance of hitting the moon should be deflected or blown up.

Uranus’ moon Ariel may look like a frozen, airless world today, but new research suggests that beneath its icy crust, it may once have held an ocean more than 100 miles (170 kilometers) deep. That ...

This peculiar behavior has long fascinated scientists, particularly after NASA’s Voyager 2 flyby of Uranus in 1986. The spacecraft revealed a planet that was unusually cold inside, prompting ...

For decades, Uranus baffled scientists because it seemed to have no internal heat. Now, new computer modeling shows the planet actually emits more energy than it receives from the Sun. This subtle ...

Today Mercury's dance with Jupiter will fuel enthusiasm and ambition. Optimism is contagious! (But so is the risk of overlooking details.) ...

In the 17th century, astronomers Christiaan Huygens and Giovanni Cassini trained their telescopes on Saturn and uncovered a startling truth: the planet's luminous bands were not solid appendages, but ...

A new British study swirled new evidence on the moon's frigid space temperatures, suggesting its different sides hold vastly conflicting degrees.

Among them is Professor Yang Li, a geoscientist at Beijing’s Peking University and an honorary professor at the University College London. His team have discovered that the inside of the mysterious ...

Saturn's icy moon Enceladus loses ice mass to space by cryovolcanic geyers, and new TACC supercomputer simulations have improved estimates of ice mass loss. These findings help with understanding and ...

Growing evidence suggests that a subsurface ocean lurks beneath the icy surface of Uranus' moon Ariel, but new research, published in Icarus, characterizes the possible evolution of this ocean, and ...