posted on Aug, 12 2004 @ 07:55 PM
Like ancient navigators.
Nasa uses stars, to tell the orientation, and direction
of a spacecraft...Take a picture of a pattern of stars, and you immeditately know
which way your spacecraft is pointing..
FOr calibration: you may want to take a picture of "nothing" every once in a while...This will tell you how well your camera is working, if any
pixels are damaged, etc......That way, if you see what you think is a spot on the Sun, you can discount it, knowing that you are actually looking at a
I noticed in the image that you linked, that there were some stars in it...