Search found 4 matches

by GGaskill
Thu Sep 13, 2007 7:45 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Six Rainbows Across Norway... (APOD 12 Sep 2007)
Replies: 22
Views: 9472

Lake

It's not unreasonable that the lake could be of substantial size and the little water visible in the picture is only a small portion of the lake. The visible water looks dark because it is reflecting the sky in the background. Direct illumination would have little affect unless the lake's surface wa...
by GGaskill
Wed Sep 12, 2007 6:00 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Six Rainbows Across Norway... (APOD 12 Sep 2007)
Replies: 22
Views: 9472

It should be possible to determine the path of the light causing the odd rainbows by finding their centers and using the known angles of refelction/refraction of raindrops.
by GGaskill
Thu Aug 23, 2007 5:28 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Southern Moonscape, lunar craters (APOD 23 Aug 2007)
Replies: 36
Views: 11112

In a dense crater field such as that, the walls of newer craters distort the geometry of the older ones.
by GGaskill
Wed Aug 15, 2007 5:56 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Discussion of APOD 15 August 2007: Mysterious Streaks
Replies: 97
Views: 76203

Non-Perseid meteors during the night of 12/13 August

I am a not very experienced observer who was located at approximately 35° 13' N, 117° 26' W, facing to the northeast and observing from 2130 12 Aug to 0200 13 Aug (times are PDT.) Almost half of the meteors observed did NOT come from the Perseid radiant but from the west (behind me) including the mo...