Crater 157

voici le nouveau cratère de Noël

Oh... Cratère lunaire?

oui

oui

Aire d'aterr... d'alunisage d'une mission Apollo?

aaaahhhh non, malheureusement pas.

mmmhh donc pris au télescope... Si l'image n'a pas été redressée... je dirais donc Sud-Est...

heuuu, je ne pense pas qu'il ait été pris au téléscope.... en tout cas je n'ai jamais vu ce beau cratère aussi bien au téléscope...

Oh... alors, lors d'une mission Apollo ou Luna, mais pas le site d'alunisage... ou alors par un des derniers satellites... bref, ca change tout ça... il peut être n'importe où ce joli cratère... (même sur la face cachée).

Bon... gros cratère?

Il a été photographié comme si c'était un père noel qui le survolait, un certain 25 décembre. Oui, assez grand. Les murs rectilignent s'étendent sur près de 240 Km, bien au delà du cratère lui même.

en l'occurence le traineau du père noel s'appelait Apollo 8

Goclenius?

Exactly

Target of Opportunity 72 is a cluster of craters east of the crater Colombo, or to its left in this photograph composited from AS08-13-2215 to 2227 using low-resolution index scans. Colombo and Gutenberg are two large craters between Mare Fecunditatis and Montes Pyrenaeus. Also of note in this area is Goclenius. Gaudibert is beyond these three. Note that perspective effects mean that the top and bottom of this pan will have large geometric distortions. The target is the cluster of craters beyond and including Crozier. These craters all have a similar size yet have different floor morphologies. To the right of Crozier is one of only a handful of "doughnut craters" on the Moon. It is far from clear how these unusual crater-within-a-crater features formed. They all have a similar shape and size and both the outer and inner crater seem to have been formed together.

Click to see larger image.
This image, AS08-13-2225, is part of the sequence in the earlier composite image. Note the impressive rille system can be seen within Goclenius. There are many of these large 'fractured floor' craters on the Moon but Goclenius stands out because it also straddles a set of graben-type rilles that border Mare Fecunditatis. By the fact that at least one of these rilles is superimposed on the crater floor, rim and surrounding mare shows how relative ages can be determined from this photograph. The crater itself is the earliest feature here followed by the smooth mare surface that surrounds it and laps against its exterior wall. The interior of Goclenius and the rilles that cross its surface probably also formed around this time. Finally, the immense weight of the dense basalts of Mare Fecunditatis caused the centre of the mare to sink. This stretched the landscape at the shore, forming the large arcuate grabens that now cut across Goclenius.]
[Goclenius is the latinised name of Rudolf Gockel (1572-1621), a German scientist. The crater, Colombo is named after the seafarer, Christopher Columbus (1451-1506) who discovered America in 1492. Johann Gutenburg (1398-1468) was the German inventor of movable type and the printing press, and Francis Crozier (1796-1848) was a polar explorer.]

Merci 20-100!