McAdie is a flooded

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 that is located along the northeastern edge of Mare Smythii, on the

far side ''The Far Side'' is a single-panel comic created by Gary Larson and syndicated by Chronicle Features and then Universal Press Syndicate, which ran from December 31, 1979, to January 1, 1995 (when Larson retired as a cartoonist). Its surrealis ...

of the

Moon The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of ...

. It lies just to the southwest of the larger, flooded

Babcock Babcock is an English surname. Notable people with the surname include: *Alpheus Babcock (1785–1842), American piano and musical instrument maker * Audrey Babcock American operatic mezzo-soprano *Barbara Babcock (born 1937), American actress * ...

. During periods of favorable libration and illumination, this area can be viewed from the

Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surfa ...

, although it is seen from the edge and not much detail can be discerned. The interior of this crater has been submerged by

basalt Basalt (; ) is an aphanite, aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the planetary surface, surface of a terrestrial ...

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 moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or un ...

, leaving only a portion of the rim projecting partially out of the surface. The rim has a break along the northwest edge, and a small craterlet lies in this opening. The interior floor is level, but a minor (unnamed) rille crosses the center of the crater roughly from east to west. The contrast in

albedo Albedo (; ) is the measure of the diffuse reflection of sunlight, solar radiation out of the total solar radiation and measured on a scale from 0, corresponding to a black body that absorbs all incident radiation, to 1, corresponding to a body ...

of the basalt in the crater versus the basalt within Mare Smythii to the west is obvious.

References

* * * * * * * * * * * * {{refend Impact craters on the Moon