Here are details about a :
Space commemorative cover
or Space Cover.
Cosmodrom : USA
Date of Cancellation: Aug. 22, 1981
Kind of Event : Tracking
Launch pad : USA Pasadena (CA)
habité?/manned?: robot
Mission type : Deep Space
ou?/where?: au sol - ground
autographe?: non - noneDescription : The end of photos of Hyperion moon. The strangest moons ever observed close up. It is one of the smaller moons of Saturn and has a strange, spongy-looking body with dark-floored craters that speckle its surface. The Voyager spacecraft showed it to have a pock-marked body and the largest irregularly shaped satellite ever observed.
Hyperion might have had a major collision which blew part of the moon away. Its eccentric orbit makes it subject to gravitational forces from Saturn which have set it tumbling out of control. The moon’s rotational period is not constant and varies from one orbit to the next. Hyperion is redder than Phoebe and closely matches the color of the dark material on Iapetus. The largest crater on its surface is approximately 120 kilometers (75 miles) in diameter and 10 kilometers (6.2 miles) deep. The irregular shape of Hyperion and evidence of bombardment by meteors makes it appear to be the oldest surface in the Saturn system. Keyword(s) :
#Aerial,
#Deep space,
#Moon and probes,
#NASA,
#Planet,
#Probe,
#Satellite,
#Stones in the sky, This is OUTSIDE of a Space Revue. Last modified: 05/29/2015 @ 15h22
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Page : future · Ref: USA 1552 Space Event : VOYAGER 2 (OUTER PLANETS PROBE) · SATURN & HER MOONS
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