Dean W. Armstrong

http://www.heavens-above.com/PassSummary.aspx?satid=25544&lat=41.781312&lng=-87.605097&loc=Chicago&alt=0&tz=CST

http://www.hcn.org/hcn/wotr/floyd-dominy-the-colossus-of-dams-dies-at-100

The view from Thorvaldseyri of Eyjafjallajökull You can just pick out the ice sheet from underneath the clouds. Compare this with the view ...

The NY Times Lede blog has linked to BBC Channel 4 video of the eruption. From the look of it, the videographer had one of the many excursi...

An interesting data point about the Eyjafjallajökull eruption: the disruption of the European aviation market reduces the CO2 output by an o...

Soichi Noguchi captures a poignant moment as the Shuttle leaves the International Space Station. Click to enlarge to a higher quality imag...

I was just reading about the Eyjafjallajökull eruption yesterday and the rather bold tourist enterprise sprung up to visit it, when I see i...

I've been unable to get the DOS software AW-SRAD to work with the geiger counter for some time, on multiple machines, with Windows XP. ...

For Photographers, the Image of a Shrinking Path By STEPHANIE CLIFFORD Published: March 29, 2010 Amateur photographers, happy to accept smal...

http://www.heavens-above.com/PassSummary.aspx?satid=25544&lat=41.781312&lng=-87.605097&loc=Chicago&alt=0&tz=CST 4 Mar ...

This is great; I've been holding off on sharing this because I felt like it was too special to share widely. But here's the deal--t...

I'm going to be honest: I can't stand anyone running cloud video footage in reverse. This drives me crazy; whether it's my phys...

Regarding that SDO video, a friend points out another video of the same event: http://www.spasmsofaccommodation.com/2010/02/sonic-boom-meets...

Sun Dogs are bright refractions of the Sun coming from horizontal ice crystals in the atmosphere. The ice crystals are usually oriented ho...