→The Solar Orbiter ( SolO) is a -observing, developed by the (ESA). SolO is intended to perform detailed measurements of the inner and nascent, and perform close observations of the polar regions of the Sun, which is difficult to do from, both serving to answer the question 'How does the Sun create and control the heliosphere?' SolO makes observations of the Sun from an eccentric orbit moving as close as 60, or 0.284 (au), placing it inside 's perihelion of 0.3075 au. During the mission the orbital inclination will be raised to about 24°. The total mission cost is US$1.5 billion, counting both ESA and NASA contributions.SolO was launched on 10 February 2020. The mission is planned to last 7 years. The launch of Solar Orbiter.

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Launch The Atlas V 411 (AV-087) lifted off from SLC-41 at Cape Canaveral, Florida, at 04:03 UTC. The Solar Orbiter spacecraft separated from the Centaur upper stage nearly 53 minutes later, and the European Space Agency acquired the first signals from the spacecraft a few minutes later. Trajectory After launch, Solar Orbiter will take approximately 3.5 years, using repeated from Earth and Venus, to reach its operational orbit, an elliptical orbit with perihelion 0.28 au and aphelion 0.91 au. The first flyby will be Venus in December 2020. Over the expected mission duration of 7 years, it will use additional gravity assists from Venus to raise its inclination from 0° to 24°, allowing it a better view of the Sun's poles. If an extended mission is approved, the inclination could rise further to 33°. See also.

– NASA scientific satellite. – NASA robotic spacecraft to probe the outer corona of the Sun. – European space observatory studying the Sun and its solar wind; cornerstone mission in the ESA Science Programme. – A 2006 concept for a series of missions to the Sun.

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