Space Shuttle Endeavor — which took off from Cape Canaveral on Wednesday, July 15 — will be clearly visible to Washingtonians this weekend, as it hurtles through space with the International Space Station at a speed of 17,500 miles per hour and 220 miles above the Earth. Get out those cameras, folks, because the flybys will be “hard to miss” — the Station and the Shuttle combined are bigger than a football field and reflect sunlight incredibly well. According to the Post, the view will be “like a very bright star passing with the apparent speed of an airliner crossing overhead.” Sounds like a sight to behold. The best times for viewing, if clouds don’t get in the way, will be between 9 and 9:30 this evening.