This image shows photographs of the heliospheres around other stars (called astrospheres) taken by a variety of telescopes. Stars travel through the galaxy surrounded by a bubble of charged gas and magnetic fields, rounded at the front and trailing into a long tail behind. The bubble is called an astrosphere, or - in the case of the one around our sun - a heliosphere. This image shows a few examples of astrospheres that are very strong and therefore visible. Credit: NASA/GSFC

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Page Last Updated: April 24th, 2014
Page Editor: NASA Administrator