[xkttocdn] Fish

Give a man a nuclear arsenal and he'll annihilate civilization for a day.  Teach a man how to build nuclear weapon

[konqisqi] Event horizon radius

The Schwarzschild radius of a nonrotating black hole grows linearly with mass with a constant of proportionality of abo

[rztlizot] Relativistic speedometer

A speedometer on, say, a car, counts the number of times the wheel has turned and divides by the time elapsed on board

[uqvqwezr] Blinking time

Create a joke device which all it does is blink the following text when plugged into power:Thu Jan 1 00:00:00 UTC 1970T

[wddkltib] Some solar system distances in light units

The speed of light gets used in the unit the light year to express distances between stars.  The speed of light ca