Astronauts on the International Space Station observe about 15 sunrises and sunsets every day
 
Astronauts become two inches taller in space
 
The first man-made object to enter space was a German V2 rocket
 
The Earth's rate of rotation is slowing at a rate of about 17 milliseconds a century. The length of a day for the dinosaurs was closer to 22 hours
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On Saturn's moon Titan, gravity is so low and the atmosphere is so thick that humans could fly by flapping arms like wings
 
Windy planet
 
Star creation