Satellites
7 questions tagged Satellites — spanning every one of the seven Ws.
Why do satellites need to orbit at different heights for GPS, communications, and Earth observation?
Different jobs need different trade-offs between coverage, signal delay, and image detail, so satellites are placed in different orbits.
Why do satellites need different orbit heights for GPS, communications, and Earth observation?
Different jobs need different coverage, speed, signal strength, and detail, so satellites are placed in orbits from low Earth orbit to geostationary orbit and beyond.
When was the first satellite placed into a geostationary orbit?
Syncom 3 became the first satellite in geostationary orbit on 19 August 1964.
Where was the first artificial Earth satellite observed in orbit?
Sputnik 1 was observed in orbit around Earth after launch from Baikonur. It became visible as a fast-moving satellite circling the planet.
What is a geostationary orbit?
A geostationary orbit is an orbit about 35,786 kilometers above Earth’s equator where a satellite appears fixed over one point on the ground. It is ideal for communications and weather satellites.
When was the first artificial satellite launched into orbit around Earth?
Sputnik 1 was launched on 4 October 1957, becoming the first artificial satellite to orbit Earth.
When was the first spacecraft launched into orbit around Earth?
The first artificial satellite, Sputnik 1, was launched into Earth orbit on 4 October 1957.