ocr: 9 97 ENI ROUTEL FOR MARS Mars 6 and 7 (cont.) The module successfully broadcast on two radio frequencies, then all transmission ceased just before touchdown. The program called for panoramic photos, a study of the regolith (the loose residual or transported material covering the planet's bedrock), and experiments to detect organic matter. But contact with the module could not be reestablisned. Mars 7 was launched from Baikonur on August 9, 1973. However, the mission was cut short: the landing module, jettisoned on March 9, 1974, could not be placed in collision orbit around Mars because of a m ...
