Reply Mon 12 Mar, 2012 09:56 am
Astronomy Picture of the Day
2012 March 12

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

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The Scale of the Universe - Interactive
Flash Animation Credit & Copyright: Cary & Michael Huang

Explanation: What does the universe look like on small scales? On large scales? Humanity is discovering that the universe is a very different place on every proportion that has been explored. For example, so far as we know, every tiny proton is exactly the same, but every huge galaxy is different. On more familiar scales, a small glass table top to a human is a vast plane of strange smoothness to a dust mite -- possibly speckled with cell boulders. Not all scale lengths are well explored -- what happens to the smallest mist droplets you sneeze, for example, is a topic of active research -- and possibly useful to know to help stop the spread of disease. The above interactive flash animation, a modern version of the classic video Powers of Ten, is a new window to many of the known scales of our universe. By moving the scroll bar across the bottom, you can explore a diversity of sizes, while clicking on different items will bring up descriptive information.

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Reply Mon 12 Mar, 2012 10:00 am
Giant earthworm example:
Reply Mon 12 Mar, 2012 10:04 am
Using the scroll bar:

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