This morning I woke up nice and early and flew to Tucson, Arizona. I am here for four nights on Kitt Peak, about 40 miles west of Tucson.
I am using a camera called "90prime" (so-named because it is a camera on the 90-inch telescope at the "prime focus," or at the top of the telescope). 90prime can take pictures of large patches of the sky -- one square degree at a time, or four times the size of the full moon. As an example of what it can do, this picture of the Pinwheel Galaxy (Messier 33). We are in the middle of an ambitious project to take 5000 pictures with this camera, or nearly 1/4 of the entire sky visible from Kitt Peak!
Tomorrow, I'll try and explain why we are doing this project.