īecause the orbit of the Moon is tilted only 5° from the ecliptic, the interior of this crater lies in perpetual darkness. The age of the crater is about 3.6 billion years and it has been in the proximity of the south lunar pole for at least the last two billion years. No significant craters intersect the rim, and it is sloped about 1.5° toward the direction 50–90° from the Earth. The rim is slightly raised about the surrounding surface and it has an outer rampart that has been only lightly impacted.
It is located within the South Pole–Aitken basin on a massif. From the Earth, it is viewed edge-on in a region of rough, cratered terrain.
The crater is 21 km (13 miles) in diameter and 4.2 km (2.6 miles) deep. The rotational axis of the Moon passes through Shackleton, near the rim. The crater is named after Antarctic explorer Ernest Shackleton. Measurements by the Lunar Prospector spacecraft showed higher than normal amounts of hydrogen within the crater, which may indicate the presence of water ice. The low-temperature interior of this crater functions as a cold trap that may capture and freeze volatiles shed during comet impacts on the Moon. The peaks along the crater's rim are exposed to almost continual sunlight, while the interior is perpetually in shadow. Shackleton is an impact crater that lies at the lunar south pole. 7.1, New York: Oxford University Press.South lunar pole as imaged by the Diviner instrument on the NASA's Lunar Reconnaissance Orbiter. Satyric Play: The Evolution of Greek Comedy and Satyr Drama. 130, 433, New York: The Metropolitan Museum of Art. Art of the Classical World in the Metropolitan Museum of Art: Greece, Cyprus, Etruria, Rome no. Ta Attika: Veder Greco a Gela Ceramiche Attiche Figurate dall' Antica Colonia no. Lexicon Iconographicum Mythologiae Classicae (LIMC). "Footwork in Ancient Greek Swordsmanship." Metropolitan Museum Journal, 24: p. "Aison, der Meidiasmaler? Zu einer rotfigurigen Oinochoe aus dem Kerameikos." Mitteilungen des Deutschen Archäologischen Instituts, Athenische Abteilung, 90: p. Attic Red-Figured Vases: A Survey, Revised Edition, 2nd edn. 81b, Cambridge, Mass.: Harvard University Press. 127, 171, New Haven: Yale University Press. Red-Figured Athenian Vases in the Metropolitan Museum of Art. 253, New York: The Metropolitan Museum of Art. "Three Red-Figured Greek Vases." Bulletin of the Metropolitan Museum of Art, 20(11): pp.
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