Thursday, June 01, 2006

The Milky Way in Motion

A series of 121 images (approximately 55 seconds exposure each) for a total of two hours of the earth's rotation compressed into several seconds staring into the heart of our galaxy. Note Jupiter in the upper right corner of the first few frames as well as a few aircraft. I might have captured one meteor and unsure about any satelites. (This gif doesn't do justice to individual frames and flickers more than it ought to on account of having to reduce the file size and quality so much so it would fit in my current allotted space.)

How the Planets Move Against the Stars

I photographed each of the six outer planets twice, 24 hours apart to show their relative motions (orbital speeds) against the stars. Except for Pluto (which I admit might not even be!), one can definitely see a decrease in motion the further out you go. Note the moons of Saturn and Jupiter, and that Saturn and Neptune "appear" to be moving in retrograde. Neptune moves so little because it just changed apparent direction.