Dean W. Armstrong

A random survey across the city of Chicago reveals a surprising detail about the growth and compatibility of 802.11b/g networks: The non-ove...

Ah. Winter solstice has arrived. Hopefully soon the winter gloom will brighten. This afternoon, I was surprised the streetlights didn...

Carl Sagan died ten years ago today. Has it really been ten years? I guess I can say it has: new visitors to Ryerson Observatory often do ...

I offer a 30-minute recording of Radio Havana Cuba from December 18th at 8:47PM CST on 6180kHz. Reception was very good here in Chicago. I...

If it's clear where you are, drive out into the country, get your warmest gear out, bring sleeping bags, ground pad, and a pillow--and e...

The location where I have my on-line geiger counter is certainly not dust-free: I work in a library after all, and the dust sure looks like...

Previous post cut short--because in about linking to Phil Plait's entry about HiRISE images , I just found his link to the press release...

I've been out of acceptable internet access for a week, thanks to broadband company that failed to realize their base stations are criti...

Via Wobha , a much better color image of Victoria Crater , as done by Bernhard Braun over at Unmannedspaceflight.com . A warning that the i...

Thinking about trying to see some meteors tonight? Don't bother--despite the press about the Leonids (which are spectacular when they ...

Just an fyi most images on the blog will be out for about six hours tonight due to a planned power outage.

Akihiko Tago of Japan discovered a new bright star in the constellation Cassiopeia on October 31st. Checking back on his images he found t...

We had a rare sunny day in November here in Chicago and so had a successful event with the 2006 Mercury Transit. Click on the image for a f...

The ISS is the largest artifical satellite orbiting Earth -- with 240ft long solar panels and a 150ft long body, its mass is over 227 tons....

Janus orbits above Saturn, taken from the Cassini spacecraft. http://saturn.jpl.nasa.gov/multimedia/images/image-details.cfm?imageID=2337