Moonbase

A moonbase was a base built on a moon.

Earth's moon
Giant Leap Base was said by Greta to be the first moonbase on the Moon. (AUDIO:  The Space Race)

A moonbase was built on the Moon during the 21st century, with a limited crew of scientists. It was under the control of International Space Command.

In 1903, after receiving a wealth of information from the future, Grigori Rasputin foresaw the lunar space station. (AUDIO: The Wanderer)

Circa the 2050s, the Gravitron, a device capable of gravitationally manipulating the tides on Earth and through them its weather, was installed. By the 2070s, it was connected to the Earth by monthly shuttle rocket runs.

In 2070, the base seemed to be struck by a disease. This was in fact a prelude to an attack by the Cybermen. The Cybermen wanted to take the base and use the Gravitron to destroy life on Earth, eliminating it as a threat. They failed, and though the normal operations of the Gravitron were briefly disturbed, eventually it resumed normal operations. (TV: The Moonbase)

At another point in the 21st century the Moonbase controlled the Earth's T-Mat system and was attacked by the Ice Warriors. (TV: The Seeds of Death)

Some billionaires went to the Moonbase to escape the plagues (PROSE: A Star's View of Caroline) that ravaged Earth in the years before the 22nd century Dalek invasion. (TV: The Dalek Invasion of Earth) The Moonbase was still cut off from post-invasion Earth in the 2190s, (AUDIO: An Earthly Child) though the human colonists there were rescued shortly afterwards. (AUDIO: Quinnis)

There was a Moonbase Academy in the 24th century. (PROSE: The Dimension Riders)

Other moonbases
Qurra, a Silurian, killed the inhabitants of a human moonbase. Jen Yates activated a doomsday device before she died, wiping out the populace of the colony planet below. Qurra's guilt at her involvement saw her adopt Yates' identity, which she only spurned, remembering who she truly was, when the Seventh Doctor, Ace and Benny visited her. Consumed with guilt, she left the base without a spacesuit, killing herself. (PROSE: Cold War)

Undated events
The Eleventh Doctor claimed to have helped a "possessed orchestra" on the moonbase. (HOMEVID: Good Night)

Alternate timelines
In an alternate timeline created by Elizabeth Klein, the Moonbase was attacked by the Selachians in 2044. (AUDIO: The Architects of History)