How to measure the distance to everything that exists, one step at a time Video 17:29, published May 25 2022 4 votes
Meteorites could have brought all five genetic 'letters' of DNA to early Earth Article 591 words 5 votes
Earth has captured a tiny object as a satellite for the next few months, which is likely the rocket booster from the failed Surveyor 2 mission to the Moon in 1966 satellites rocketry Article 1045 words 12 votes
The elusive peril of space junk - Millions of human artifacts circle the Earth. Can we clean them up before they cause a disaster? satellites Article 9380 words 7 votes
"Fat Earth Theory" - How the oblateness of the Earth affects the orbits of satellites satellites Video 7:54 3 votes
Asteroid on collision course with Earth burns up hours after it was detected Article 399 words 10 votes
If there were a kind of a fireman's pole from the Moon down to the Earth, how long would it take to slide all the way from the Moon to the Earth? Link 10 votes