Asteroids, comets and Kuiper belt are bodies smaller than planets that orbit the sun. Asteroids are composed of metals and rock, whereas comets also contain ice and dust. The Kuiper belt is a ...

Pluto likely acquired large moon Charon in a “kiss and capture” collision billions of years ago. It may have created a subsurface ocean on the icy dwarf planet.

Using the Atacama Large Millimeter Array, astronomers have discovered icy exocomet belts circling 74 different alien planetary systems.

Pluto contains more rock than ice, while Charon is 50% rock ... Pluto belongs to a group of objects that distantly orbit the sun called the Kuiper Belt, where thousands of icy remnants left ...

A once-in-a-lifetime comet is set to become visible for the first time in 160,000 years - and you don't want to miss it.

"Exocomets are boulders of rock and ice, at least 1 km in size ... picture of a 'belt' like our solar system's Edgeworth-Kuiper belt. But a larger number of them are wide, and probably better ...

Venus, Jupiter, and Mars dominate the sky. Catch your last views of Saturn as early in the month, the Moon passes in front of ...

Planetesimal belts, remnants of the planet formation process, hold a wealth of clues about planetary systems beyond our own. These belts, analogous to the Kuiper and asteroid belts in our Solar System ...

while Charon is smaller and about 50% rock and 50% ice. The bodies maintain their structural integrity and eventually separate, likely preserving the ancient structures of both bodies, which initially ...