We changed our privacy policy. Read more.

New answers tagged


Sputnik 1 was filled with nitrogen to detect damages by micrometeroites causing a leak and a pressure loss. Therefore electrical vacuum feedthroughs were needed to connect the antennas to the transmitters. Sputnik’s antennas consisted of four whips attached to the aluminum enclosure through insulators that were spaced symmetrically around the circumference ...

Top 50 recent answers are included