Lunar observation satellite (Clementine) data are sharpened by special process, and the distribution and the differences of composition of basalt constituting the lunar sea can be clearly observed (near the Aristarchus Crater). Yellow part is anorthosite, blue indicate basalt of the lunar sea. Estimation of the titanium content of the basalt is also attempted (near the Aristarchus Crater). The differences of basalt composition within the lunar crater can be clarified by special processing (the structure of Tsiolkovsky Crater at the backside of the moon).