Space and satellites Flashcards
Our solar system is found in…
The Milky Way galaxy.
Planets in our solar system are:
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus & Neptune.
What happens with the temperature as the plants get further from the sun?
It decreases
What is the length of a year?
The length of a year is the time taken for a planet to orbit the sun once.
The scale of the universe:
- Planets
- Stars (including sun)
- Solar system
- Galaxy
- Universe = a group of solar systems
Geocentric model =
Earth is at the center and the sun and planets orbit it. (Ptolemy)
Heliocentric model =
All the planets orbit the sun in perfect circles (Copernicus)
The law of planetary motion =
Orbit of planets around the sun are elliptical. Scale of universe (Kepler)
Galileo…
used a telescope, he saw moons orbiting Jupiter.
Telescopes
✔️ Relatively cheep.
❌ Only work at night, don’t work if there are too many clouds.
Rovers
✔️Can take samples and send info back to Earth.
❌Might crash land.
Satellites (probes)
✔️Don’t need astronauts so can go deep into space.
❌No one on board to fix any malfunctions.
Wat is a satellite?
Anything that orbits a planet.
How many types of satellites are?
2 with are 1.natural E.g. Moons, asteroids and comets
2. Artificial- man made= geostationary & polar
What is a Geostationary satellite?
Is a satellite that orbits around the equators, at the same speed as earth rotates so that they stay above the same point.
