If a gamma-ray burst hit Earth, would we be able to realize it even happened to us due to its speed?
The problem is speed doesn’t matter. We wouldn’t know until after it hit us. Gamma-ray bursts move at the speed of light. No warning system could alert us…
Has something ever left the Milky Way?
Yes, something that we have created already left the Milky Way Galaxy; it might have even reached Andromeda Galaxy, 2.5 million light-years away and 59 currently known satellite…
What should you never say at the US-Canada border?
I got myself into long-term trouble. Maybe this story can help someone avoid shady border officers’ tactics at the border. I did some contract design work for an…
If I shoot a bullet at Earth from the Moon, what will happen when it reaches the Earth?
The .220 Swift remains the fastest commercial cartridge in the world, with a published velocity of 4,665 ft/s (1,422 m/s) and the escape velocity of the MOON is 2,400 m/s so the…