Dean W. Armstrong

Epimetheus glides in front of Saturn's rings with Titan far in the background. Phil Plait's Bad Astronomy has pointed out another ...

Check out this awesome movie of the aurora as seen from the ISS: Movie Also see Astronaut Don Pettit's longer science movie with real-...

This weekend I traveled to Yerkes Observatory in Williams Bay, Wisconsin, on a trip organized by the Ryerson Astronomical Society . It was...

The Messenger spacecraft on its way to Mercury flew back past Earth on August 2nd, 2005, and produced this wonderful movie while departing ...

Steven previously mentioned his favorite absorption line in the sun's spectrum as sodium. And what's not to like: Strong, conspicu...

A recent flight to Los Angeles had great results. Halfway through the flight the pilot announced he was dropping from the 38,000ft cruising...

Mike Brown, Emily Schaller, Henry Roe, David Rabinowitz, and Chad Trujillo released their Hubble measurements of the disk of 2003 UB313 and...

I had the good fortune of being quite busy over the weekend: I was a guest of Hugh M. Hefner at the occasion of his 80th birthday , and it ...

While on the couch in my apartment in the late-evening last night the light of the just-past First Quarter Moon fell upon my eyes. It told...

The online science world is abuzz over Forrest Mims's claim that a UT Austin Bio prof said scientists should kill 90% of the world'...

Michael Milligan gave me a great site for the NOAA GOES weather satellite images and merged a few for a look at the low-pressure system t...

O, it is monstrous, monstrous: Methought the billows spoke and told me of it; The winds did sing it to me, and the thunder, That deep and dr...

Is NASA's review process fair and unbiased? Does the fact that a mission has been reinstated after officially being cancelled show that...

Night will turn to day in the eclipse's route and a corona will glow around the edges of the moon as it comes between the earth and the ...

I'm back from my spring break geo field course in Southern Nevada, Arizona, and California, and I've been out for seven days with no...