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Zond 5 was an uncrewed Soviet spacecraft launched in September 1968 as part of the Soviet Union's lunar program. It became the first spacecraft to travel around the Moon and return safely to Earth, splashing down in the Indian Ocean. The mission carried several biological specimens, including Russia...
The Venera 4 mission, undertaken by the Soviet Union, represents a pivotal moment in space exploration. Launched in 1967, it was the first spacecraft to successfully enter the atmosphere of another planet – Venus. Venera 4 transmitted data regarding atmospheric pressure and temperature before succum...
ISEE-3 (International Sun-Earth Explorer 3) was a NASA spacecraft launched on August 12, 1978, originally placed in a halo orbit around the Sun-Earth L1 Lagrange point, making it the first spacecraft stationed at a Lagrange point. In 1982 it was redirected and renamed the International Cometary Expl...
NASA's Magnetospheric Multiscale Mission (MMS) is a four-spacecraft constellation launched on March 12, 2015, to study magnetic reconnection in Earth's magnetosphere. The four identical spacecraft fly in a tight tetrahedral formation, sometimes only kilometers apart, enabling three-dimensional measu...
The Advanced Composition Explorer (ACE) is a NASA Explorer mission spacecraft launched in August 1997 to study matter from the solar wind and the interstellar medium. Positioned at the Earth-Sun Lagrange point 1 (L1), it orbits roughly 1.5 million kilometers from Earth, allowing it to sample energet...
STEREO-A (Solar TErrestrial RElations Observatory-Ahead) is one of two identical NASA solar observation probes launched together in October 2006. The twin spacecraft, which included the now-lost STEREO-B, were designed to provide the first stereoscopic 3D images of the Sun and study the properties o...
Wind is a NASA science spacecraft launched on November 1, 1994, as part of the Global Geospace Science program. It was initially placed in a complex orbit that allowed it to sample the solar wind upstream of Earth before being moved to a stable position near the L1 Lagrange point, approximately 1.5...
DSCOVR (Deep Space Climate Observatory) is a NOAA and NASA Earth observation and space weather spacecraft launched on February 11, 2015, and stationed at the Sun–Earth L1 Lagrange point approximately 1.5 million kilometres from Earth. It carries instruments to monitor solar wind plasma and magnetic...
