/u/rj_yul's posts in /r/askscience

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How did space program pioneering engineers like Von Braun and Korolev know the exact reentry trajectory and angle to successfully come back to earth when no one had ever attempted it before?

31 upvotes

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Desperately need help with VPN in China. Can't access my Gmail. Any suggestions for a reliable VPN?

1 upvotes

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Why is it that when two trains going in opposite directions pass each other their speed seems multiplied but when driving a car and a plane is coming to land on the opposite direction , the plane looks as if it's not moving?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How did space program pioneering engineers like Von Braun and Korolev know the exact reentry trajectory and angle to successfully come back to earth when no one had ever attempted it before?	31
Desperately need help with VPN in China. Can't access my Gmail. Any suggestions for a reliable VPN?	1
Why is it that when two trains going in opposite directions pass each other their speed seems multiplied but when driving a car and a plane is coming to land on the opposite direction , the plane looks as if it's not moving?	1