South Pole-aitken Basin

South Pole Aitken Basin

- * * present distributions Over time, the movement of continents, oceans and winds slows down the Earth's rotation. It also causes the Moon to spiral away from Earth by the principle of conservation of angular momentum. The curve at right hypothesizes the change of lunar distance in the past. It is hypothetic because the past distribution of land and sea is not ascertained. Today the Moon is receding from Earth at average rate of 3.8 cm year, a result obtained by laser ranging since the Apollo...

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Rima Messier 4. Lubbock 5. Rimae Godenius 6. Amortons 7. tn Battuta 8. Lindbergh 9, Dorsa Mawsor 10. Dorsa Cato 11. Dorsum Cayeux 12. Dorsum Cushman 13. Rimae Secchi (lCHnf 6 Newtonian) 1. Messier 2 Messier A 3. Rima Messier 4. Lubbock 5. Rimae Godenius 6. Amortons 7. tn Battuta 8. Lindbergh 9, Dorsa Mawsor 10. Dorsa Cato 11. Dorsum Cayeux 12. Dorsum Cushman 13. Rimae Secchi (lCHnf 6 Newtonian)

Bhr

2005.04.23 -15 38 UT Age 14.8 days. 10-mi 6 +2.5X +ToUcam (inosaic) Riccioli 2005.05.22 -14 31 UT Age 14.3 days. 10-inf 6 + 5X + ToUcam Riccioli 74.60 W 3.30 S A walled plain near the limb, 139 km in diameter. The Moon's equator crosses its northern outer wall. The southern floor of Riccioli is crossed by a system of rilles (Rimae Riccioli, 400 km). The northern floor is lava-flooded. Riccioli C is a 31-km crater in which the floor is stuck by another crater. A heavily obliterated walled plain,...

Crisium

South of Mare Crisium 2004.08.02 -17 53 UT Age 16 days. 10-in fVB Newtonian + 2.5X + ToUcam 1. Firmicus (63.40E 7.30N, diameter 56 km) 2. Lacus Perseverantiae (Lake of Persistence, a small wedge-shaped lava plain extruded from Firmicus.) 3. Webb (60.00E 0.90S, diameter 21 km) 4. Condon (60.40E 1.90N, diameter 34 km) 5. Apollonius (61.10E 4.50N, diameter 53 km) 6. Townley (63.30E 3.40N, diameter 18 km) 7. Cartan (59.30E 4.20N, diameter 15 km) 8. Daly (59.60E 5.70N, diameter 17 km) 9. Ameghino...

Yvp

Moon Craters Convex

A simulated non-oblique view of SchiIler. The picture center line is 40 W, 2005.04.21 13 & 6UT Age 12.5 days 10-h re+4X+ToUcam. SS frames stacked. (Other examples of elongated craters in Map 3, 4, 6, 12, 14 & 20 Segner 48.30 W 58.90 S A shallow crater with rough floor, 67 km in dia. Zucchius 50.30 W 61.40 S A terraced crater, diameter 64 km, depth 3200 m. The territory between Schiller and Zucchius is an impact basin characterized by two concentric mountain rings. The inner ring (dia. 200...

O T

Hercules 39.1 E 46.7N Atlas and Hercules are prominent pair of craters near the north-east limb. Their walls look similar but their interiors are very different. Atlas is 87 km in diameter, with a small central peak and terraced walls rising to about 3000 m. Its rough floor contains two fairly dark patches and a complex fracture of rilles (Rimae Atlas) which are believed of volcanic origin. Hercules is a terraced crater with relatively flat floor, 69 km in diameter. It has a lava-submerged...

Sinus Roris

Mare Frigoris

FS128 + LE12.5+ CP990 2002.Da.21 14 40 UT Age 1 days. FS128 + LE12.5+ CP990 Mare Frigoris (Sea of Cold) 1.40 E 56.00 N While lunar maria generally tend to be circular in shape, Mare Frigoris is not. It extends roughly 300 km north-south and 1,600 km east-west between Lacus Mortis and Sinus Roris, see the inlet of Image T024A. The formation of Mare Frigoris is not ascertained. Some geologists suggested that it could be part of the lava-filled depression that...

T 64

Hadley Delta

Rima Hygimis 2()iM.09.0E 21 23 UT Age 21 days. 10-ln f 6 Newtonian + 2.SX + 1.6X + ToUcam, 47 frames. The crater in the middle of the rille is Hyginus. It is rimless, has flat floor and hence appears volcanic rather than impact-created. Presumably Hygintis Is volcanic, it would be a lava outlet and the riile would be a lava channel. Rima Hygimis 2()iM.09.0E 21 23 UT Age 21 days. 10-ln f 6 Newtonian + 2.SX + 1.6X + ToUcam, 47 frames. The crater in the middle of the rille is Hyginus. It is...

Mm

O'Neill's Bridge (arrow) Is a nicknamed feature composed of two adjoined, small eroded crater. 2004.0B.31 16 53 LIT Age 15 days. 10-in 6'6 + 2.5X + Tollcam Yerkes 51.7UE 14.6UN This is a pair of similar shaped flooded craters. Lick is 31 km in diameter. Yerkes is 36 km and connects to a satellite crater (Yerkes E, 10 km) through a ridge. The most noticeable wrinkle ridges on the western edge of Mare Crisium, length 270 km. This dorsum, together with Dorsa Harker and Dorsa Tetyaev on the eastern...

Qmq

Crater Walter

Deslandres to Maginus The was crater Waller but now renamed as Walltier. 2000.11.05 13 35 UT Age 9 days. FS128-LE12.5- V2300 A large walled plain, 194 km in diameter. It is much older than Tycho, as suggested by the eroded rim, the interior peppered with impact craters and the absence of rays. A vast ruined walled plain, 256 km in diameter. Its floor contains crater Hell (33 km), short chains of secondary craterlets and a bright spot. See Image T074. A walled plain with mountain massif on its...

T226

Vasco da Gama 83.90 W 13.60 N (Image T204A) A crater with a small central peak, 83 km in diameter. Rima Cardanus 710 W 110 N (Image T204A) A linear rille in the northeast of Olbers and Glushko, length about 170 km. It is indistinctive, especially when the bright rays of Glushko happen to sweep over it. A sharp-rimmed terraced crater with a small central peak, 49 km in diameter. A skeptical ghost ring just lies outside the northeast rim of Cardanus. A sharp-rimmed terraced crater, 51-km in...

Uxo

Byrgius A wfth brigtit rays 2 6-04+3 ifcWuT Age 14.S 10-ln TO Newtonian A 42-km crater with small central peak. It is a rayed center under high Sun angles. Sirsalis intersects the rim of Sirsalis A (once known as Bertaud, diameter 49 km). A trough is just outside Sirsalis A. In Image T196, Sirsalis is shadowed by the terminator and hence appears like a black hole. A strip of ridge extends from the northern rim of Sirsalis. This ridge forms the eastern rim of the irregular crater Sirsalis Z (91...

Nasa 008a

Mare Humboldtianum

Gauss, Endymion S Mare Humboldtianum seen by Galileo spacecraft, 1992 Gauss, Endymion S Mare Humboldtianum seen by Galileo spacecraft, 1992 Mare Humboldtianum (Humboldt's Sea) is a difficult visual object because its rim extends to the farside of the Moon. A better terrestial view is given in T180 and T103, when the libration was favorable. Mare Humboldtianum is physically the central lava-flooded portion of a multi-ring impact basin. The lava floor is 270 km in diameter, but the whole basin...

Wl

The edge of Sinus Iridum resembles a golden handle at this time. 2002.12.14 16 40 UT Age 10 days. C9 + Of 25 + CP990 1,r4sec, DSCN5B32 The edge of Sinus Iridum resembles a golden handle at this time. 2002.12.14 16 40 UT Age 10 days. C9 + Of 25 + CP990 1,r4sec, DSCN5B32 Sinus Iridum 2002.12.16 14 02UT Age 12 days. 10-in tf6 Royce mirror +2.5X+ToUcam, 2 frames stacked. Sinus Iridum 2002.12.16 14 02UT Age 12 days. 10-in tf6 Royce mirror +2.5X+ToUcam, 2 frames stacked. Sinus Iridum (Bay of...

Nasa 016

Catena Davy from Apollo 12 spacecraft Davy and Catena Davy 2004.09.05 -20 12 LIT Age 21 days. 10-in f 6 Newtonian + 5X + Tollcam 150 msized) In T093, a dome is recognized outside the rim of Davy. Six lAU-named craters are marked along the eastern section of Catena Davy Davy and Catena Davy 2004.09.05 -20 12 LIT Age 21 days. 10-in f 6 Newtonian + 5X + Tollcam 150 msized) In T093, a dome is recognized outside the rim of Davy. Six lAU-named craters are marked along the eastern section of Catena...

T233

Inverted Channel Lava

Marius Region 2004.09.26 -15 36 LFT Age 12 days. 10nn f 6 Newtonian + 4X + ToUcarn 2005.04.21 14 17UT Age 12.5 days. 10-in fy6+4X+ToUcam Marius Region 2004.09.26 -15 36 LFT Age 12 days. 10nn f 6 Newtonian + 4X + ToUcarn 2005.04.21 14 17UT Age 12.5 days. 10-in fy6+4X+ToUcam A crater in the middle of Oceanus Procellarum. It has a flat floor, 41 km in diameter. Its rim is stuck by a small elongated crater Marius H. The vicinity of Marius is rich in wrinkle ridges and dome-like hills, best seen at...

T

L*f iH ' li.P I Jf K t fflft A rima is a rille, an open or slumped channel on the Moon's surface. Rilles are classified according to their appearance. Sinuous rilles are found mostly in maria (lava plains). They are thought to have been formed by running lava and hence become narrower as they flow downslope fine examples are Rima Hadley in Map 14 and Rima Marius in Map 20. Linear rilles are straighter, and can cross mare and highland boundaries. They might be either collapsed lava tubes, or...

Moon Libration 59 Percent

Libration The Moon Mosaic

Dionysius with dark rays beneath a white halo 2006.03.09 13 UT Ageio< feys.io-ini6+5X+ToUcarn Dionysius with dark rays beneath a white halo 2006.03.09 13 UT Ageio< feys.io-ini6+5X+ToUcarn Tha arrow points to a bright patch on the floor of Desfandres This patch was first noted by Rays of Menelaus crossing Mare Serenitatis the 17th century astronomer Gassini, hence nicknamed Cassini's Bright Spot'. zra.03.ii 16 11 ut Age 15 days. FS128 + plis CP995 Tha arrow points to a bright patch on the...

Procellarum

Flamstiod S vicinity 20M.09.25 -14 44 T Aga 11 days. IWnflS+lSX+ToJcam Flamsteed 44.30 W 4.50 S A crater, 20 km in diameter. It is just inside the ghost ring formation Flamsteed P. This ring has incomplete wall of diameter 112 km, and is believed an ancient impact crater flooded by lava during the formation of Oceanus Procellarum. Letronne 42.50 W 10.80 S Remains of a flooded crater, 116 km in diameter. It appears like a bay which opens to Oceanus Procellarum. Three small central peaks and a...

Lacus

Posidonius 2, Rimae Posidonius 3. crate fete f-1 km) 4. Posictonius J S.Chacornac-6. Rimae Chacornac 7. G. Bond 8. Rima G. Bond 9. Hall 10. KFrchhoff 11 Darnell 2006.05.12 -20 49 UT Age 18 days. 10-in f S Newtonian + 2.5X + 1.6X + ToUcam (mosaic) I Posidonius 29.90 E 31.80N (Image T241) A spectacular walled plain between Mare Serenitatis and Lacus Somniorum, 95 km in diameter. Its floor contains low hills (probably volcanic domes), prominent ridges and a wide system of rilles (Rimae...

T148

Wtchmann 2006.05.09 14 40 UT Age 12 days 10-in ff Newtonian + 4X + ToUcam Wtchmann 2006.05.09 14 40 UT Age 12 days 10-in ff Newtonian + 4X + ToUcam Wichmann 38.10 W 7.50 S A bowl-shaped crater, 10 km in diameter. Its northern rim connects to an arc-shaped mountain. Its southern rim is linked to an irregular mountain through a ridge. Scheele 37.80 W 9.40 S A 4-km bowl-shaped crater. Reiner 54.90 W 7.00 N An isolated crater in the middle of Oceanus Procellarum, with central peak and fairly rough...

C J

AndSI . 17. Lindsay 18. Kant 1 I 23. Apollo 16 landing site 24. A chain afcratertets 2005.11.09 11 43 UT Age 7 days 10-ir f 6 Newtonian + 2.5X + ToUcam Catena is a chain of small craters, generally resulted from secondary impacts, or from fragmental impacts of a tidally disrupted meteoroid asteroid. An exception is the chain of tiny craters inside Rima Hyginus Map 13, which appears to be volcanic rather than impact-originated. The most known crater chain is...

On Successive Night Moon Rising Delay Time

Between apogee and perigee, the Moon moves 12 15 degrees per day eastward among the star background. As a result, moonrise repeats every 24.3 25.2 hours, and so it must be delayed in successive days. There is always one day with no moonrise (e.g. 2007 July 08 in Hong Kong) and one day with no moonset (2007 July 23) in each lunar month. The Moon's retrograde motion in the sky It takes the Moon Exact moonrise or moonset is defined by the time when two full days to cross Scorpius from west to...

Hs15s8119s7

The above mosaic shows the landing site of Apollo 15 1971 July . The mountain is Hadley Delta at the foothills of Montes Apenninus Map 14. Astronauts called it a featureless mountain quite true in this picture . They found lunar scenery almost white or black. They also reported that distances on the Moon were hard to estimate, partly because the Moon's surface curves more sharply than that of the Earth and hence the horizon is closer, partly because there is no atmosphere and hence no softening...