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

the flag of USA
Cosmodrom : USA

Date of Cancellation: Nov. 25, 1976
Kind of Event : Test
Launch pad : USA KSC Florida
habité?/manned?: robot
Mission type : Experimental & Science

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

Description : A report, "Viking relativity experiment: verification of signal retardation by solar gravity" published in 1979 by researchers at MIT and the Jet Propulsion Laboratory, analyzed 14 months of data obtained from radio ranging to Viking to verify the prediction of the general theory of relativity. The round-trip or echo delays of light signals traveling between the Earth and Mars would be increased by the direct effect of solar gravity. The theory included gravitational time dilation, where time passes differently in regions of different gravitational potential.

Keyword(s) :
#Mars and probes,

SPACE REVUE : 04 - 2003

Last modified: 04/29/2015 @ 22h08

very low stockpurchase this item USA  925  6,-  
very low stockpurchase this item USA  930   7,-  
ask if availablepurchase this item USA  963   7,-  
very low stockpurchase this item USA  971   7,-  

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enveloppe USA 925 - cover USA 925
USA 925

Page : future · Ref: USA  925 

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Space Event :


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