Birmingham is the surviving remnant of a

lunar Lunar most commonly means "of or relating to the Moon". Lunar may also refer to: Arts and entertainment * ''Lunar'' (series), a series of video games * "Lunar" (song), by David Guetta * "Lunar", a song by Priestess from the 2009 album ''Prior t ...

impact crater An impact crater is a depression (geology), depression in the surface of a solid astronomical body formed by the hypervelocity impact event, impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal c ...

. It is named after the astronomer

John Birmingham John Birmingham (born 7 August 1964) is a British-born Australian author, known for the 1994 memoir ''He Died with a Felafel in His Hand'', the ''Axis of Time'' trilogy, and the well-received space opera series, the ''Cruel Stars'' trilogy. ...

(not, as is often stated, the British city nor its Alabama namesake). The crater is located near the northern limb of the

Moon The Moon is Earth's only natural satellite. It Orbit of the Moon, orbits around Earth at Lunar distance, an average distance of (; about 30 times Earth diameter, Earth's diameter). The Moon rotation, rotates, with a rotation period (lunar ...

, and so is viewed from the

Earth Earth is the third planet from the Sun and the only astronomical object known to Planetary habitability, harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all ...

at a low angle. All that survives of the original formation is an irregular perimeter of low, indented ridges surrounding the

lava Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a Natural satellite, moon onto its surface. Lava may be erupted at a volcano or through a Fissure vent, fractu ...

-resurfaced interior. The inner floor is marked by several tiny craterlets, and the surface is unusually rough for a walled plain. The low angle of illumination allows fine details of this boulder-strewn field to be seen more clearly.

Location

The Birmingham formation lies just to the north of the

Mare Frigoris Mare Frigoris (Latin ''frīgōris'', the "Sea of Cold") is a lunar mare in the far north of the Moon. It is located in the outer rings of the Procellarum basin, just north of Mare Imbrium, and stretches east to north of Mare Serenitatis. It is j ...

, and to the east of the walled plain W. Bond. To the northeast is the smaller crater Epigenes, with Fontenelle to the west.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Birmingham.

References

* * * * * * * * * * * * {{Craters on the Moon: A–B Impact craters on the Moon