DR. DAVIDSON is quite right in remarking that it is not necessary to introduce an observer at great distance from the Earth in order to measure proper time. But neither is it necessary to bring ...
The team, led by Wu Yunhua, director of the aerospace control department at Nanjing University of Aeronautics and Astronautics, demonstrated in a computer simulation that nearly 1,400 Starlink ...
Proba-3, which includes two satellites, launched earlier this month ... It’s not the first time scientists have used artificial eclipses to study the sun, but some astronomers say this mission ...
The industry ministry said the global number of satellite launches in 2021 was 14 times the figure for 2011. Artificial satellites play a vital role not only in acquiring location information and ...