Dean W. Armstrong

The bright "star" next to the nearly Full Moon tonight was Jupiter, in case you were wondering.

http://www.skyandtelescope.com/observing/home/101264994.html My first thought once it was confirmed was "What is the real rate of visib...

Link and run: http://arstechnica.com/science/news/2010/06/breaking-news-jupiter-hit-by-yet-another-impactor.ars

Jupiter's South Equatorial Belt, normally a brown-red, has gone as pale as the cream white zones surrounding it. Check out the report w...

The LRO imaged most of the Apollo landing site on the Moon. Things will get better as the orbital parameters are modified. There appears t...

Things have been very busy and as a result I've been unable to post--but today is the 50th anniversary of man's entry into space wit...

I just ran out and saw the Space Station and the ISS passing to the north, a touch dimmer than Jupiter. If I were inclined, I could see the...

An older image, but cool nonetheless . Earth and Jupiter visible from Mars, taken by the now-deceased Mars Global Surveyor. Make sure you ...

The last good pass of the International Space Station for Chicago in the near future will be tomorrow, June 22nd. You may be asking, why i...

Last night was a fantastic pass--photos will be up in the next post. Tonight, see them again, this time starting at 9:52:07PM in the NW, r...

Wow--New Horizons has created an animation of Tvashtar on Io erupting --it's gorgeous: Credit: NASA/Johns Hopkins University Applied Phy...

The gorgeous plumes of Ionian volcanos rise into the sunlight on this image taken from the New Horizons spacecraft as it sped past Jupiter. ...