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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
 SCIENCE 

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

Informations : 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) :
Einstein     
Mars and probes   
Planet     
Satellite     
Sonde     
Sun     

Space Revue: 04 - 2003

Last modified: 04/29/2015 @ 22h08

Buy SEE ALSO  EurUS $Yen
purchase this item USA  925  6,-   7.14  780 
purchase this item USA  930   7,-   8.33  910 
purchase this item USA  963   7,-   8.33  910 
purchase this item USA  971   7,-   8.33  910 

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  enveloppe USA 925 - cover USA 925
USA 925

Space Event :
VIKING 1 & 2 (MARTIAN ORBITERS & LANDERS) · EXTENDED MISSION
Page : future
Ref: USA  925 

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