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more Sun-Earth satellites


There are several other satellites currently being used to study the Sun and its effect on the Earth. This page gives a quick description of the main ones.





The Advanced Composition Explorer was launched in August 1997. Like SOHO, it also orbits at the Lagrange point, 1/100th of the distance from the Earth to the Sun. ACE has a variety of instruments, which sample the solar wind. It can detect shock waves ploughing through the solar wind towards the Earth. When reporting space weather, ACE can provide an advance warning (about one hour) of geomagnetic storms that could overload power grids, disrupt communications on Earth, and present a hazard to astronauts.




Image was launched in March 2000. It is designed to study the magnetosphere and aurora from space.



Geotail was launched in 1992, Wind in 1994 and Polar in 1996. These satellites also provide information on the connection between the Sun and the Earth.


Here are some beautiful images of the aurora taken from space. The colours are false, red shows where the aurora is strongest.




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