Sinus Medii

Sine Medii - Latin for bay the middle - is a small lunar sea in the center of the near side of the Moon. The name comes from the German astronomer Johann Heinrich von Mädler and in 1935 officially defined by the International Astronomical Union.

The dark gray basalt surface of the solidified lava lake has oval shape with diameters of approximately 330 x 170 kilometers. When the sun is low, some north- south running road lines and grooves are recognizable by their shadows. The center of the low- level selenographic coordinates 2 ° North and 1 ° East.

The southwestern, eponymous part is nearly round and has only two small craters with 7 km ( Bruce ) and 5 km. On the southern edge of the lava has flooded the crater wall of Oppolzer and transformed into a ghost crater.

The northeastern part is slightly more ridged and has Triesnecker a 30 km wide impact crater. In the north, the lava plain narrows along the Triesnecker and Hyginusrille, reconciled to the Mare Vaporum.

To the west of the sine Medii by a range of hills of sine Aestuum is disconnected. The most striking structure further south is 153 kilometers wide level Wall Ptolemy.

In sinus Medii landed in 1967, the Surveyor lunar probes 4 and 6 Surveyor former failed Surveyor 6 on the other hand sent in several weeks thousands of pictures and data.