Solar system
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Suntrek
Site about the sun and solar system – lots of information, photos, video clips etc.
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The known universe
Youtube vid from American Museum of Natural History showing the extent of the known universe.
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The size of our world
Series of photos which give a really good sense of scale for the solar system.
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The virtual solar system
From National Geographic website.
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Voyager’s epic journey
From BBC news site – how long would it take you to make the journey?
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Why isn’t Pluto a planet any more?
Youtube clip from “ask the astronomer”.