4.8.1.1 Our solar system Flashcards
What are the 8 planets in our solar system-in order?
Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune
What is the name given to the first 4 planets in our solar system?
Rock dwafs
What is the name given to the last 4 planets in our solar system?
Gas gaints
What is the diameter of the Earth?
13,000km
How much bigger is the sun compared to the Earth?
100x wider
How many starts are in the Milky Way?
At least 200 billion
Where is the asteroid belt?
Lies between Mars and Jupiter(closer to Mars)
What is an asteroid?
Huge lumps of rock that stay in an stable orbit
What is a comet?
Balls of dust and frozen gas. They have a very elliptical orbit
How can we tell which way a comet is travelling?
The tail of the comet point away from the sun so we know the direction in which the comet is travelling.
How long are comets close to the sun for?
About a month
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