2007 in spaceflight 2007 in spaceflight The year 2007 contained several significant events in spaceflight, including a Chinese ASAT test, the launches of the US Phoenix and Dawn missions to study Mars and Asteroid belt respectively, Japan's Kaguya Lunar orbiter, and the first Chinese Lunar probe, Chang'e 1. The internationally accepted definition of a spaceflight is any flight which crosses the Kármán line, 100 kilometres above sea level. The first recorded spaceflight launch of the year occurred on 10 January, when a PSLV, launched from the Satish Dhawan Space Centre, placed four spacecraft into low Earth orbit. One of these spacecraft was SRE-1,
Explorer 47 Explorer 47 Explorer 47, also known IMP-7 and Interplanetary Monitoring Platform IMP-H, was an American satellite launched as part of Explorers program. Explorer 47 as launched on 23 September 1972 on Cape Canaveral, Florida, U.S., with an Delta rocket. Explorer 47 was the seventh satellite of the Interplanetary Monitoring Platform. Explorer 47 continued the study begun by earlier IMP spacecraft of the interplanetary and magnetotail regions from a nearly circular orbit, near 37 earth radii. This 16 sided drum-shaped spacecraft was high and in diameter. It was designed to measure energetic particles, plasma and electric and magnetic fields. The spin