A volcano erupts with lava, fire and smoke.

An active volcano spews out hot red lava and smoke.

A volcano comes to life with fire, smoke and lava.

It is thought that comets may have seeded Earth's oceans. After the planets had largely formed, there was a period lasting several hundred million years, during which the young worlds continued to accrete debris, raining down from space.

Full moon rising above a sand dune.

A newly formed volcano smokes with hot steam.

Panorama of a landscape on Venus at 700 degress Fahrenheit.

Saturn's moon, Tethys, is split by an enormous valley called Ithaca Chasma.

The creation of a new planet as gravity brings together all matter of space debris.

Artist's depiction of an alien world in close proximity to the star it revolves around.

Scarp on Mercury

Kepler 10b is the first extrasolar planet discovered that is known to be solid.

Metorite

Basalt lava rock escarpment