Those of you who follow me on Twitter know that I've been fiddling with images from the Mars Webcam, more officially known as the Mars Express Visual Monitoring Camera (VMC), for the last couple of weeks. This camera is both awful and awesome. It was...

We have three orbiters and two rovers currently exploring Mars, each of which returns breathtaking photos on a daily basis. (Well, Mars Reconnaissance Orbiter hasn't been returning photos for months, but yesterday I learned via Twitter that the...

I've gotten this question about once a week since Spirit got stuck, but yesterday, two different readers asked the same question within an hour of each other, so I figured it was time for a blog entry. The question: Can't they use the robotic arm to...

The ever-vigilant Doug Ellison of unmannedspaceflight.com just posted this animation, which really actually does show a teeny tiny bit of motion in the right front wheel. If you don't notice any motion, look closer. It's eensy, but it's there. Cause...

The Moon is the most familiar of the objects in the heavens. So it's kind of incredible to think about the fact that humans had never seen half of it until just fifty years ago, on October 7, 1959, when the Soviet Luna-3 returned the first images of...