Universe Cluster Galaxy Star and Sun Planet and Earth Moon Asteroid Meteor Our universal address would be: Weatherhead high School, Breck road, Wallasey, CH44 3HS, England, Europe, Earth, Sol, Milky Way Galaxy, Andromeda Cluster, The Universe.
The intense gravitational field left when a giant star collapses
Satellites Path followed by satellite Path followed if gravity switched off Pull of gravity Earth
Useful orbits There are TWO main orbits that are useful called POLAR and EQUATORIAL . POLAR -The orbit is close to the Earth, only just above the atmosphere. With a good camera you can see the headlines on a newspaper!
Because the Earth spins the satellite will ‘see’ every part of the Earth once every 24 hours . This orbit is used for spy and weather satellites. Polar orbits
Equatorial orbits At the right distance the satellite will take 24 hours to orbit the Earth. Because the Earth is also spinning once each 24 hours the satellite stays above the same place on the Earth all the time. We call this a GEOSTATIONARY orbit. This orbit is used for communication satellites, like Sky TV.
Know that: Earth is one of a number of planets that orbit the Sun: the Moon orbits Earth; Earth orbits the Sun and the relative positions of Earth, Sun and planets
Know that the Universe consists of: stars and planets, comets and meteors, black holes, large groups of stars called galaxies
Describe why stars can be seen even though they are far away
Describe that gravitational force determines the motion of planets and satellites
Know the relative positions of planets, stars, comets, meteors, galaxies and black holes
Know that circular motion requires a centripetal force and that gravity provides the centripetal force for orbital motion
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