You can also buy full-apeture solar filters in the appropriate dimensions to put over your telescope. Orion even sells small ones in pairs to use with binoculars. I seem to recall reading that this particular shot (which I first saw on spaceweather.com) was taken using a telescope specifically designed for solar viewing, however. Those types of telescopes are favored by dedicated sun observers, because they can be fitted with hydrogen-alpha filters to get some really interesting pictures of the Sun.<br /><br />A shot like this takes an appropriately filtered telescope, a good camera, an accurate pass prediction, and an accurate clock. (Invest in an atomic clock if you want to do this. Seriously. It takes *seconds* for the ISS to transit the Sun, so if you blink you really will miss it.) I would think that Starry Night or comparable software would be able to predict the pass, provided you have current two-line elements for the satellite you're trying to photograph. (A TLE is a standardized way of expressing a satellite's orbit precisely. The orbits change over time, and you need a high degree of precision for this. A rough pass prediction won't be enough.) But I've never tried to do this, so I won't guarantee anything. <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em> -- The Tenth Doctor, "Blink"</font></p> </div>