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Interstellar Helium Flow in the Solar System

Date: 22 September 2004
Satellite: Ulysses, ACE, EUVE
Depicts: Data from multiple satellites on Helium flow
Copyright: ESA

Data from several satellites on the flow of interstellar helium in the solar system is presented here. The figure shows a compilation of the observations along with weighted mean values from all available observations.

Upper panel: direction of the helium flow in ecliptic coordinates.

Lower panel: flow speed and temperature. 

It is evident that the direct observation of the neutral atoms by the GAS instrument provides the flow characteristics with the least uncertainty. 


Last Update: 22 September 2004

For further information please contact: SciTech.editorial@esa.int

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