Eddington is 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 ...

-flooded remnant of a lunar

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 ...

, located on the western part of

Oceanus Procellarum Oceanus Procellarum ( ; from ) is a vast lunar mare on the western edge of the near side of the Moon. It is the only one of the lunar maria to be called an "Oceanus" (ocean), due to its size: Oceanus Procellarum is the largest of the maria ("s ...

. The western rim is attached to the wall of the walled plain Struve. To the east-southeast is the smaller but prominent crater

Seleucus Seleucus or Seleukos (Ancient Greek: Σέλευκος) was a Macedonia (ancient kingdom), Macedonian Greek name, possibly meaning "very bright" or “very white”. It is likely related to the ancient name Zaleucus (Ancient Greek language, Ancient ...

. South of Eddington is Krafft. Seleucus Si - Ferruggia Zetta

The south and southeastern rim of Eddington is almost completely gone, leaving only a few ridges and promontories in the

lunar mare The lunar maria ( ; mare ) are large, dark, basaltic plains on Earth's Moon, formed by lava flowing into ancient impact basins. They are less reflective than the "highlands" as a result of their iron-rich composition, and hence appear dark to ...

to trace the outline of the original crater. As a consequence, Eddington is now essentially a bay in the

. The remainder of the rim is worn and irregular, forming a mountainous arc that is widest in the north. The floor is almost free of craters of significance, with the nearly submerged crater Eddington P lying in the southeast sector. If the crater once had a central peak, it is no longer evident. The crater was named after the British astronomer and mathematician Sir

Arthur Eddington Sir Arthur Stanley Eddington, (28 December 1882 – 22 November 1944) was an English astronomer, physicist, and mathematician. He was also a philosopher of science and a populariser of science. The Eddington limit, the natural limit to the lu ...

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 Eddington.

References

* * * * * * * * * * * * {{Craters on the Moon: C-F Impact craters on the Moon