1/12
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced |
---|
No study sessions yet.
Gravity
The force needed to maintain a stable orbit of planets around a star and satellites around a planet
Orbit
The circular path that an object follows as moves around another body in space
Satellite
Any object that orbits a planet
Natural satellite
A natural object that orbits a planet e.g. the Moon
Artificial satellite
An artificial object that orbits a planet e.g. communication satellites
Stable orbit of a satellite
When the speed of a satellite is slow enough to stop it flying off into space, but fast enough to stop it falling back towards the planet
Problem when a satellite is travelling too quickly
The gravitational attraction between the Earth and the satellite is too weak so the satellite will fly off into space
Problem when a satellite is travelling too slowly
The gravitational attraction between the Earth and the satellite will be too strong so the satellite will fall towards the Earth
Speed at which a satellite will fly off into space
Above 11,200 m/s
Speed at which a satellite will fall towards the Earth
Below 7600 m/s
Geostationary satellite
A satellite that orbits the Earth at the same rate as the Earth rotates
How long it takes for a geostationary satellite to orbit the Earth
24 hours
Position of a geostationary satellite relative to the Earth's surface
It remains above the same place on the Earth's surface