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
Evidence of water on Mars from Mars Odyssey Evidence of water on Mars from Mars Odyssey Evidence of water on Mars from Mars Odyssey is about observations by a Mars orbiter, named 2001 Mars Odyssey, supporting evidence for water on that planet. Mars Odyssey found much evidence for water on Mars in the form of pictures and with a spectrometer it proved that much of the ground is loaded with ice. In July 2003, at a conference in California, it was announced that the Gamma Ray Spectrometer (GRS) on board the Mars Odyssey had discovered huge amounts of water over vast areas of Mars. Mars has enough ice