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 created artificial satellites—human-made machines and spacecraft in orbit around our Earth or other objects in our galaxy. These types of satellites have fundamentally changed humanity—such as connecting us with ...
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 de notre planète Terre. Mais par exemple, Mars en possède 2 et Jupiter plus de 60 !
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.
Le 4 octobre 1957 marquait le lancement du satellite Spoutnik. Cinquante ans après, l'équipe du planétarium fête l'événement durant quatre séances. 50 ans de l'histoire de la conquête spatiale Spoutnik signifie « compagnon de voyage » en russe.
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 through a network of 66 satellites in polar, low-Earth orbits. Inaugurated in November 1998, under the auspices of Iridium LLC, this complex space system allowed callers using hand-held mobile phones and ...
Quand nous regardons la Lune, elle nous présente toujours la même face. Grâce aux sondes lunaires, on a pu avoir des images de la face cachée de notre satellite naturel. Cette face est beaucoup plus cratérisée que celle visible depuis la Terre. C'est comme si la Lune nous avait protégé de la chute de nombreux astéroïdes et météorites qui, sans elle, auraient normalement percuté ...
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 understand changes in the Earth's land surface.
The U.S. Air Force began developing this air-launched antisatellite missile (ASAT) to destroy enemy satellites after the USSR demonstrated its ability to attack satellites in space. At the tip of this two-stage missile was a Miniature Homing Vehicle (MHV). Once it separated from the missile, the MHV homed in and destroyed a satellite by direct collision, rather than by detonation of a warhead ...
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 technology and has played an important role in our history.
