Stephen James O'Meara's Secret Sky: Deep naked-eye diving
April 2010: See if you can spot objects millions of light-years away with your eyes alone.
Contributed by Stephen James O'Meara
Published:
February 22, 2010
 M81 in Ursa Major lies some 12 million light-years away, but is still faintly visible to the naked eye. The author estimates its magnitude at 6.9, and from mid-northern latitudes M81 sits high in the north during evening hours this time of year.
Photo by N.A. Sharp (NOAO/AURA/NSF) |
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