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by Monica Schroeder
$15.00
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Product Details
Our spiral notebooks are 6" x 8" in size and include 120 pages which are lined on both sides. The artwork is printed on the front cover which is made of thick paper stock, and the back cover is medium gray in color. The inside of the back cover includes a pocket for storing extra paper and pens.
Design Details
The center of the Milky Way is a crowded neighborhood and not always a calm one, as seen in this image from NASA's Chandra X-ray Observatory. In The... more
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The center of the Milky Way is a crowded neighborhood and not always a calm one, as seen in this image from NASA's Chandra X-ray Observatory. In The Drake Equation is used to calculate the possible number of extraterrestrial civilizations in the Milky Way Galaxy.
N = R* fp ne fl fi fc L
N = number of civilizations with which humans could communicate.
R* = mean rate of star formation.
fP = fraction of stars that have planets.
ne = mean number of planets that could support life per star with planets.
fl = fraction of life-supporting planets that develop life.
fi = fraction of planets with life where life develops intelligence.
fc = fraction of intelligent civilizations that develop communication.
L = mean length of time that civilizations can communicate. to the supermassive black hole at the center, the area is filled with all sorts of different inhabitants that affect and influence one another. The image shows three massive star clusters: the Arches...
$15.00
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