Search found 4 matches

by cathalferris
Tue Oct 01, 2013 12:32 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Mysterious Green Patches on the Sky (2013 Sep 30)
Replies: 275
Views: 509896

Re: APOD: Mysterious Green Patches on the Sky (2013 Sep 30)

It's not related to sunrise - the timeframe of the video is far too long for it to be sunrise-related - especially when the photographer confirmed that the exposure time was constant. Dawn related phenomena would be viewed towards the north east at this latitude and time of year, not the southeast. ...
by cathalferris
Tue Oct 01, 2013 11:05 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Mysterious Green Patches on the Sky (2013 Sep 30)
Replies: 275
Views: 509896

Re: APOD: Mysterious Green Patches on the Sky (2013 Sep 30)

Okay - there are some hypotheses that are way off-base. Let's think this one through, in an intelligent and logical manner.. There's unlikely to be any high-altitude cloud present - the star images do not spread or dim appreciably in the video. Neither is there any obvious dimming of the aircraft tr...
by cathalferris
Mon Sep 30, 2013 12:08 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Mysterious Green Patches on the Sky (2013 Sep 30)
Replies: 275
Views: 509896

Re: APOD: Mysterious Green Patches on the Sky (2013 Sep 30)

The green patchy moving glow - the simplest explanation is that it is airglow. The movement is about the right rate compared to other videos that I have seen of the phenomenon. Things that discount the other suggestions above: There is no dimming or enlargement (halo) of background stars until the v...
by cathalferris
Thu Aug 29, 2013 11:44 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Bright Planetary Nebula NGC 7027... (2013 Aug 26)
Replies: 1200
Views: 193691

Re: APOD: Bright Planetary Nebula NGC 7027... (2013 Aug 26)

Starfleet Nebula.

To me it looks quite like the Star Trek Starfleet symbol.