Q: What is the simplest way to observe the optical Doppler effect?
A: Go out and look at cars. The lights of the ones approaching you are white, while the lights of the ones moving away from you are red.

“If there was no such thing as night the Sun would have run out twice as fast.”

Black holes are where God is dividing by zero.

After eating his first meal on the Moon, the astronaut reported, “The food was good, but the place lacked atmosphere.”

Why did Captain Kirk go into the ladies toilet?
To boldly go where no man has been before!

 

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