Saturday, February 9, 2013

Voyager 1 at the Heliopause

From The American:
Voyager has traveled so far that it is now near the heliopause. At the heliopause, the solar wind — the stream of charged particles that emanates from the sun and causes such phenomena as aurorae and the tails of comets — becomes so attenuated that it blends into the interstellar medium. The heliopause, in other words, is the farthest limit of the sun’s empire. Beyond is true interstellar space, the empire of the Milky Way.

A man-made spacecraft has entered interstellar space. Very very cool. 


  1. This comment has been removed by the author.

  2. Bach

    Why did you delete your comment?

    1. I deleted it because I realized it wasn't important. I'd just noted that Voyager-1 hadn't actually left the solar system until it travels another 2 trillion km or so. It's possibly still in the Kuiper belt. If not, it's certainly in the Oort Cloud.

      So, it isn't in interstellar space. It's still very very cool, though...

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