Today's Moon Phase: First Quarter

Observational Interest: Large ancient crater overlaid by ejecta from the Imbrium basin impact, it shows the effects of major basin impacts on pre-existing topography and the relative ages of lunar features.

Observational Interest: Straight valley cutting through the Montes Alpes, a prime example of a lunar graben, formed by tectonic stresses.

Observational Interest: Prominent and extensive scarp, representing a section of the rim of the ancient Nectaris impact basin. A demonstration of the immense scale of early lunar impacts.

Observational Interest: Ancient lava channel or collapsed lava tube that meanders along the base of the Apennine Mountains. Close to the landing site for the Apollo 15 mission.

Observational Interest: Large, ancient crater known for its floor fractures (rilles) and several dark halo craters, interpreted as sites of explosive volcanic eruptions.

Observational Interest: Crater in Mare Tranquillitatis, notable for the nearby volcanic domes Arago Alpha and Arago Beta.

Observational Interest: Large crater in eastern Mare Imbrium wita a lava-flooded floor that lacks a central peak. Its walls are terraced, and it's surrounded by ejecta from the later Autolycus and Aristillus impacts.

Observational Interest: Multi-ring impact basin located on the northeastern limb of the Moon. Its limb position makes observation dependent on favorable libration.

Observational Interest: Located on the Moon's eastern limb, it is notable for its irregular shape and the presence of lunar swirls, high albedo deposits thought to be associated with local magnetic fields.

Observational Interest: A large, circular mare notable for the contrasting colors of its basaltic lava flows, indicating different compositions and ages. It's also home to the Serpentine Ridge and the Apollo 17 landing site.

Observational Interest: Elongated impact basin containing a relatively thin layer of mare basalt. Its visibility is highly dependent on libration.

Observational Interest: Prominent crater near the northeastern limb which is notable for its fractured floor, which contains rilles and dark-halo craters, indicative of past volcanic activity.

Observational Interest: Ancient crater characterized by an unusually smooth floor for its age and location, possibly due to infilling by ejecta or volcanic material.

Observational Interest: Heavily eroded and lava-flooded crater, appearing as a ghostly outline in Sinus Medii. Largely buried by later mare deposits, it shows the effects of Imbrium basin ejecta, also known as Imbrium sculpture.

Observational Interest: Part of a prominent trio of large craters with Theophilus and Cyrillus. Catharina is the oldest and most heavily eroded of the three.

Observational Interest: Large, ancient crater forming a prominent trio with Theophilus and Catharina. Cyrillus is older and more degraded than Theophilus, but younger than Catharina. It features a rugged floor, a complex central peak.

Observational Interest: Highland crater famous as the landing site for the Apollo 16 mission.

Observational Interest: Large crater near the Moon's eastern limb with complex floor, featuring prominent central peaks, systems of concentric and radial rilles, and patches of dark material.

Observational Interest: Large ancient crater with a fractured floor positioned on the southern shore of Mare Nectaris. Its northern rim is largely missing or submerged by mare lavas.

Observational Interest: Large, very ancient and heavily battered crater located near the center of the Moon's nearside. Its rim is heavily worn and broken by subsequent impacts. It holds historical significance as one of the first lunar features to be drawn with the aid of a telescope.

Observational Interest: Elongated and heavily degraded crater with a lava-flooed floor and prominent Imbrium basin ejecta.

Observational Interest: Large, ancient, and heavily worn crater in the southeastern highlands. Its floor contains the prominent crater Fabricius and a notable rille system, Rimae Janssen.

Observational Interest: Irregular patch of mare material located in Terra Nivium, north of Mare Vaporum. It contains a few tiny craterlets and Ina, a D-shaped depression thought to be a very young volcanic caldera.

Observational Interest: plain of basaltic lava, it's name means 'Lake of Death'. It's notable for the large crater Bürg located within it, and a complex system of rilles (Rimae Bürg) and ridges on its floor, indicative of past tectonic and volcanic activity.

Observational Interest: Large, peculiar feature in Mare Tranquillitatis, barely visible as a circular set of low wrinkle ridges. It's thought to be the outline of a buried impact crater or basin, almost completely inundated by mare lavas.

Observational Interest: Prominent impact crater located on the eastern edge of Mare Fecunditatis. It is characterized by its bright terraced walls, a notable central peak complex, and an aged but still visible ray system, especially under high sun illumination.

Observational Interest: Very distinct, isolated circular mare on the Moon's eastern limb, easily visible even to the naked eye. It's contained within a large impact basin and has a relatively flat floor, with wrinkle ridges and a few prominent craters like Picard and Peirce.

Observational Interest: Large, ancient, and complex crater in the heavily cratered southern highlands, representing an area of saturation cratering. It has a rugged rim, a relatively flat floor, and a prominent central mountain complex.

Observational Interest: Well-defined impact crater located near the Moon's central meridian. Its small satellite crater, Mösting A, is notable for being used as a fundamental reference point in selenodetic coordinate systems.

Observational Interest: Large crater with a fractured floor and a complex system of rilles (Rimae Posidonius) covering its lava-flooded floor.

Observational Interest: Large, striking impact crater near the southeastern limb of the Moon. It is distinguished by its massive terraced walls, a prominent central mountain complex, and, most notably, a major rille, Rima Petavius, that extends from the central peaks to the southwestern rim. Its floor is also uplifted and convex.

Observational Interest: A small but bright impact crater located west of Mare Crisium, notable for its asymmetric, fan-shaped ray system, which indicates an oblique impact.

Observational Interest: A well-defined crater in Sinus Medii, known for the extensive and complex system of rilles to its east, Rimae Triesnecker.

Observational Interest: Crater forming a conspicuous pair with the similar-sized crater Sabine to its west. This is a possible twin impact from a binary asteroid, or formed by an object that broke apart shortly before impact.

Observational Interest: Prominent crater in the southeastern highlands, notable for being the starting point of Vallis Rheita, which is one of the longest valleys on the Moon.

Observational Interest: Crater forming a distinct pair with the crater Ritter to its east. Their similar size and proximity have led to theories that they could be twin impacts.

Observational Interest: Young floor-fractured crater located in Mare Fecunditatis, characterized by a convex floor, a system of concentric rilles, and a low central peak.

Observational Interest: Relatively young large crater, forming a trio with Cyrillus and Catharina near Mare Nectaris. Theophilus is the youngest of the three, showcasing well-defined terraced walls, a broad flat floor, and a massive central mountain complex.

Observational Interest: Large crater located very close to the Moon's North Pole. Its polar location makes it extremely difficult to observe from Earth. It's of scientific interest as some parts of its floor may be permanently shadowed and could contain water ice.

Observational Interest: An ancient and heavily eroded crater in the southern highlands, notable for its unusual central peak (Regiomontanus A), which has a small crater pit at its summit, suggesting possible past volcanic activity.

Observational Interest: The 'Sea of Cold', a long, arcuate mare stretching across the northern latitudes of the Moon. Its origin is debated, possibly not a single impact basin.

Observational Interest: Spectacular mountain range forming the southeastern rim of the Imbrium Basin.