Search found 7 matches

by webolife
Fri Dec 25, 2015 8:11 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: To Scale: The Solar System (2015 Dec 25)
Replies: 45
Views: 11660

Re: APOD: To Scale: The Solar System (2015 Dec 25)

Nice video. I've done scale modeling with students on a half kilometer radius stretch, with a sun about the size of a softball at one end. Chris, how is gravitationally warped space-time intuitive, for scientists or anyone?? I felt the desert demonstration would have been even better if they had sim...
by webolife
Mon Dec 03, 2012 7:56 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Quadruple Lunar Halo Over Spain (2012 Dec 03)
Replies: 43
Views: 19076

Re: APOD: A Quadruple Lunar Halo Over Spain (2012 Dec 03)

The CHA actually nearly parallels [ie. as an arc of a concentric circle with] the horizon, so does not correspond to an angle with respect to the central line of light/sight. In an unusual halo phenomenon in Seattle a couple years ago, there was a CHA projected nearly 30 degrees to both left and rig...
by webolife
Fri Jun 24, 2011 3:13 pm
Forum: The Observation Deck: Latest Sky Photography
Topic: Mystery Flash on Mauna Kea
Replies: 126
Views: 264073

Re: Mystery Flash on Mauna Kea

I'm curious how one envisions fuel discharging with a sphere that moves along with its center... wouldn't that produce more of a wake shape or possible a spiral? In order to retain the spherical/circular form, would not the object have to be moving relatively away from or toward the observer? The ha...
by webolife
Mon Jan 10, 2011 7:07 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Sun Halo Beyond Stockholm (2011 Jan 10)
Replies: 25
Views: 5836

Re: APOD: A Sun Halo Beyond Stockholm (2011 Jan 10)

This picture also shows the circumhorizontal halo, produced by the same effects as the sundogs, as well as the pillar of fire produced by columnar ice crystals tumbling down parallel to the horizon.
by webolife
Thu Aug 19, 2010 7:02 pm
Forum: The Communications Center: Breaking Science News
Topic: Ask an Astrophysicist - APOD's Dr. Jerry Bonnell
Replies: 70
Views: 18647

Re: Ask an Astrophysicist - APOD's Dr. Jerry Bonnell

How does Dr. Bonnell feel about the Electric Universe theory? It seems to be gaining a large following, and presents some provocative information. Has he looked into it at all, or does he have any strong case evidence against it? [quote="JTB"] Actually, a former colleague and friend of min...
by webolife
Wed Jan 28, 2009 10:14 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Unusual Light Pillars Over Latvia (2009 Jan 12)
Replies: 176
Views: 184896

Re: Unusual Light Pillars Over Latvia (2009 January 12)

Whether it's the temperature gradient of astrolabe or the wind shear mixing factor of pmanson , these two explanations make the most physical sense to me. This is clearly an optical/lensing event, and a movie of the event might be insightful as to the wind option. I wonder if the photographer has of...