Exploration of Mars failed upon impact. Mars 4 flew by the planet at a range of 2200 km returning one swath of pictures and radio occultation data, which constituted the first detection of the nightside ionosphere on Mars. Mars 7 probe separated prematurely from the carrying vehicle due to a problem in the operation of one of the onboard systems (attitude control or retro-rockets) and missed the planet by . In 1964, NASA's Jet Propulsion Laboratory made two attempts at reaching Mars. Mariner 3 and Mariner 4 were identical spacecraft designed to carry out the first flybys of Mars. Mariner 3 was launched
Mars Society | "eingetragener Verein" | - MSD) was founded in 2001 based on the Founding Declaration of the Mars Society of the USA from 1998 and has about 230 members. The MSD is registered in Germany as a non-profit association ("gemeinnütziger Verein"). Registered members pay a yearly membership fee of 60 Euro. However, students and firms pay a different fee. The activities of the MSD are focused on technical-scientific projects such as the Mars Balloon Probe ARCHIMEDES as well as on all Mars exploration and general manned space matters. The main means of communication with members and the general public is