Aurora Borealis

• by alice.fitzgerald89

  Why is purple the least likely colour for the aurora?

  Posted January 8, 2014 9:24 PM

• by Budgieye moderator

  I didn't see the show tonight (too busy here) but I believe that is is the lowest down, so the cosmic rays have to penetrate further down.

  try http://odin.gi.alaska.edu/FAQ/#color

  Posted January 8, 2014 10:01 PM