Hi Tom, As you may know, in June there will be a transit of Venus past the sun. I hear this is a great opportunity for astrophotographers and science educators. They have asked if I can send extra alerts to people who should be able to photograph Venus and ISS in front of the sun at the same time. If I am not mistaken, your module can calculate where and when these events coincide, but I don't really know where to start. Do you have suggestions on how to approach this problem? I thought I'd post my question here, as this may interest others as well. Thanks! Jaap