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by Science Source
$25.00
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Bottom Style
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Product Details
Dress it up, dress it down, or use it to stay organized while you're on the go. Our zip pouches can do it all. They're crafted with 100% poly-poplin fabric, double-stitched at the seams for extra durability, and include a durable metal zipper for securing your valuables.
Our zip pouches are available in three different sizes and with two different bottom styles: regular and t-bottom.
Design Details
Tombaugh using the blink comparator to check images of night sky taken at the same time a few nights apart. Stars remain fixed in the sky, so any... more
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Spot clean or dry clean only.
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2 - 3 business days
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Tombaugh using the blink comparator to check images of night sky taken at the same time a few nights apart. Stars remain fixed in the sky, so any sign of movement among them on Tombaugh's photographic plates would indicate that the "star" was in fact a planet. Clyde William Tombaugh (February 4, 1906 - January 17, 1997) was an American astronomer. He became an assistant at Lowell Observatory. Lowell himself predicted the existence of a ninth planet, and a team was set up to find it. He invented the blink comparator to facilitate the search. This device allowed comparison of two photographs of the sky, which showed if any object had altered position. In 1930 he discovered the dwarf planet Pluto, the first object to be discovered in what would later be identified as the Kuiper belt. He also discovered nearly 800 asteroids and hundreds of variable stars, as well as star clusters, galaxy clusters, and a galaxy supercluster. He is also credited with the discovery of periodic comet 274P/Tomb...
$25.00
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