2022年4月12日 · A satellite is an object that is in orbit around an object in space of a larger size. Things such as the Earth's Moon or Pluto's Charon are natural satellites. Humans have also …

C'est quoi un satellite ? GRANDES QUESTIONS C'est un objet qui tourne autour d'une planète. Il peut tourner autour de la Terre … ou d'une autre planète ! La Lune est le seul satellite naturel …

Learn about how a communications satellite works and how it helps us to connect to each other around the world.

Telstar, launched in 1962, was the first active communications satellite: it received microwave signals from ground stations and retransmitted them across vast distances back to Earth.

2011年4月8日 · Most people know that satellites in orbit do useful things such as collect images of the Earth's surface. At the National Air and Space Museum I use satellite images in my job to …

The Discoverer XIII satellite had been launched the previous day from Vandenberg AFB. "Discoverer" was the cover name for the highly classified U.S. Air Force/Central Intelligence …

2016年5月2日 · Ground-penetrating radar (GPR) gathers information on subsurface features using radio waves that are transmitted into the subsurface that then reflect off differing layers …

Military reconnaissance is an operation to obtain information relating to the activities, resources, or military forces of a foreign nation or armed group. It uses balloons, aviation, and space …

2023年7月11日 · The recent launch of VA261 closes out the Ariane 5 rocket’s 117 launches. Take a look back at Europe’s workhorse launcher and the next generation in Ariane 6.

This satellite is the heart of a space-based communications system called Iridium. Conceived, designed, and built by Motorola, the Iridium system provides wireless, mobile communications …