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Here are details about a :
Space commemorative cover
or Space Cover.

the flag of USA
Cosmodrom : USA

Date of Cancellation: Jun 5, 1981
Kind of Event : Tracking
Launch pad : USA Pasadena (CA)
habité?/manned?: robot
Mission type : Deep Space

ou?/where?: au sol - ground
autographe?: non - none

Description : Cover Space travel and Voyager two observatory phase begins June 5, 1981.
While passing behind Saturn (as viewed from Earth), Voyager 2 probed Saturn’s upper atmosphere with its radio link to gather information on atmospheric temperature and density profiles. Voyager 2 found that at the uppermost pressure levels (seven kilopascals of pressure), Saturn’s temperature was 70 kelvins (−203 °C), while at the deepest levels measured (120 kilopascals) the temperature increased to 143 K (−130 °C). The north pole was found to be 10 kelvins cooler, although this may be seasonal (see also Saturn Oppositions).

Keyword(s) :
#Deep space,

This is OUTSIDE of a Space Revue.

Last modified: 05/29/2015 @ 11h42

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enveloppe USA 1540 - cover USA 1540
USA 1540 - picture enhanced ?

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