Dean W. Armstrong

The ESA's Rosetta spacecraft flew by Mars yesterday on its long mission to reach Comet 67P/Churyumov-Gerasimenko in 2014. As is standar...

The moon wheels closer to full over the week, moving ever closer to its eclipse on Saturday. Image source: MMT Skycam .

The impressiveness of the Mars Reconaissance Orbiter's instruments continues to amaze me. Geek Counterpoint has a link to a HiRISE imag...

This unidentified hoax device was found in a Hyde Park establishment where it has been hanging up for over a year, hooked up with wires to l...

Technicolor aurora and Comet McNaught. From Spaceweather.com

Now that the Adult Swim light board is a known, non-terroristic device, Chicago Police Superintendent Phil Cline has saved! Chicago from mas...

CNN report on the ad campaign for a Cartoon Network TV show that closed universities, blocked river traffic, and caused mass overreaction. ...

Via Scientific American's blog , a link into Google's Flash application of world statistics, Gapminder , accurately described as ...

CNN is reporting that: President Bush, in Tuesday's State of the Union address, will propose a plan to cut U.S. gasoline consumption by...

Arms Control Wonk is passing a rumor, which Aviation Week and Space Technology will also run a story on January 22nd, that the Chinese lau...

Last night it started clearing up right near sunset, and through scattered clouds I was able to see a blazing new comet, C/2006 P1 McNaught,...

You never know from embargoed press releases--in this case, from the ESA . The online edition of Nature will publish, on 8 January 2007, a m...

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 ...