Beyond the Solar System
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Bernard Nebel.
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Our sun, with our solar system is just one star within a huge cluster of some 100-400 billion stars making up the Milky Way Galaxy. Then, spread out through the reaches of space there is evidence for at 100-200 billion galaxies in the universe. Type into your browser: galaxies images/.
The following video is an introduction to an astronomy course. It is long but provides a photographic “tour” from the solar system out. It should perk interest.
The following video is a historical sketch of how such astronomical distances have been estimated.
See also, type into your browser: cosmic ladder
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