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Physics
The Universe (Section 8)
Question | Answer |
---|---|
What is the universe? | A large collection of billions of galaxies |
What is a galaxy? | A collection of stars |
What force keeps stars in a galaxy together? | Gravity |
What are planets? | Large objects that orbit a star |
What are dwarf planets? | Planets that aren’t big enough to be classified as a planet |
What are moons? | Objects that orbit a planet |
What are the two kinds of satellite? | Natural and artificial |
Give an example of a natural satellite | A moon |
Give an example of an artificial satellite | The International Space Station |
What are asteroids? | Lumps of rock and metal that orbit the sun |
What are comets? | Lumps of ice and dust that orbit the sun |
What shape are the orbits of comets? | Elliptical |
The asteroid belt is a region of our solar system that contains millions of asteroids. Which two planets is the asteroid belt found between? | Mars and Jupiter |