1) Impact crater on Mars 
[crater] Saheki Crater is a crater in the Iapygia quadrangle of Mars, located at 21.75° S and 286.97° W. It is 85 km in diameter and was named after Tsuneo Saheki, a Japanese amateur astronomer (1916–1996). The crater contains a number of alluvial fans, which are preserved in inverted relief. Image:Saheki Crater.jpg|A smaller crater ins...