Tuesday, October 8, 2013

Crescent Moon, Venus, and Antares Tonight

Created with Stellarium.
If it remains clear locally, expect a nice view early this evening after sunset. Venus and the moon will be fairly close (6 degrees). That's a photo op in itself, but if you wait until it begins to get dark, you may see Antares as the lower left corner of an almost-equilateral triangle. The trick will be for it to be dark enough to see see the star, which is fainter than Venus or the moon, before it goes behind the trees, buildings, etc. on your southwestern horizon.

To get a sense of scale, I'm putting a picture I took of the moon and Venus a month ago (therefore about the same moon phase!), with distance labels. If Antares were there, it would get the label of 5.3 x 10^18 meters, or 550 light years.

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