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37 Cards in this Set
- Front
- Back
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Solar System
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sun and the objects that orbit around it
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Orbit
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the path an object takes as it moves around another object in space
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Planet
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Large body of rock or gas that orbits the sun
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Are asteroids and commets part of the solar system?
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yes
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Is the sun a planet or a star?
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Star
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Gravity
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the force of one object's pull on another
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Name the inner planets (in order going away from the sun)
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Mercury, Venus, Earth and Mars
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How is earth different from the other inner planets?
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it has watery surface, oxygen, animal and plant life
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What do the inner planets have in common?
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they have rocky surface, closer to the sun and are warmer, mostly smaller than outer planets
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Name the outer planets (in order going away from the Sun)
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Jupiter, Saturn, Uranus, Neptune and Pluto
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How are the outer planets alike?
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They are mostly made of frozen gas, they are far from the sun and colder, all but Pluto are much larger than the inner planets
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What is the largets planet?
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Jupiter
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How much bigger than Earth is Jupiter?
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1000 times bigger
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What is the smallest planet?
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Pluto
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Asteroid
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chunk of rock that orbits the sun
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Comet
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large ball of ice and dust that orbits the sun
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What does the comet's orbit look like?
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oval shaped
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When can you see a comet?
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when it gets close to the sun so you can see its glowing gasses
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Which part of the comet do you see?
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the tail
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Star
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hot ball of glowing gases
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are all stars the same distance from Earth?
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no
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constellation
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a group of stars that forms a pattern
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Do the stars actually move at night?
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No, they look like it -- the earth moves instead
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Why do the constellations seem to move every season?
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Because the earth circles the sun
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Do the constellations near the North Pole seem to move?
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No
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telescope
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instrument that makes things that are far away look close
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Who used teh first telescope?
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Galileo
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What did Galileo see through the first telescope?
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the rings of Saturn
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how does a radio telescope work?
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it uses radio waves
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how does an optical telescope work?
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It uses light
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What does a Refracting telescope use to make things look larger?
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lenses
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What does a Reflecting telescope use to make things look larger?
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a curved mirror
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What kind of telescope is most common?
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reflecting
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Why is it hard to get good pictures from telescopes?
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The air makes the stars twinkle and they look blurry
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Where are many telescopes located? Why?
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On tall mountains because the air is thinner
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What is better about a radio telescope?
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The air and weather don't affect the picture
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Are there telescopes in Space? Why?
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Yes - they can get better pictures!
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