7: Our changing Sun and its effects throughout the solar system:

Understand our changing Sun and its effects throughout the solar system

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NASA is conducting a series of Solar Terestrial Probe missions to understand the intrinsic nature of the Sun and its effects on the Earth, on other planets, and on the space between them. For example, NASA will examine the physics of the magnetosphere, the outermost region of the Earth’s at m o s p h e re where the solar wind collides with the Earth’s magnetic field. Other missions, including a cooperative mission with Japan, will study the basic dynamics of our Sun and the connection between the solar wind and the Earth’s magnetosphere and ionosphere (the atmospheric region next closest to the Earth). The Living with a Star program will study the causes of solar activity and its impact on Earth and on human exploration. Solar flares can incapacitate Earth-orbiting satellites, disrupt electrical power grids, and expose astronauts to health hazard s ; understanding them is crucial to quality of human life both on Earth and in space.

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