... The spacecraft was built in Japan and the observing instruments have contributions from the U.S. and from the U.K. Улисс . ... in February, 1992, where a gravity assist manoeuvre placed the spacecraft in a unique solar polar orbit, allowing it to fly ...
... However, because it is very difficult to get long time series of a single star with a spacecraft, most detailed study of single stars has been mapping of spots using visible light photometry and spectroscopy. ...
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