Search found 2 matches
- Tue Nov 22, 2011 10:38 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Around the World in 90 Minutes (2011 Nov 21)
- Replies: 82
- Views: 20861
Re: APOD: Around the World in 90 Minutes (2011 Nov 21)
A little bit of atmospheric optics, instead of geography for my part: Between 4:20 & 4:22, there seems to be a part of a Moon cloudbow, on the bottom right part of the image. (Orion star constellation is at the horizon, this day the Moon was somewhere in the Sagittarius at the opposite of Auriga...
- Tue May 12, 2009 12:15 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: (Not) An Iridescent Cloud Over Ohio (2009 May 12)
- Replies: 19
- Views: 4531
Re: (Not) An Iridescent Cloud Over Ohio May12
I totally agree with Mr Cowley, these are not irridescents clouds, but circumhorizon arc. One more thing about iridescent clouds, is that the sun is not far from the direction of look (maybe a douzen a degree at maximum). For circumhorizon, the sun is at least at 46° from the optic phenomenon. If th...