Here are details about a : Space commemorative cover  or Space Cover.
  
Cosmodrome / Location : China
  
Date of Cancellation: Dec. 6, 2020 
Exist : 1500  copies Event Type : Launch Launch Pad / Location : China Xichang Manned / Robotic Mission : Robotic Mission Objective/Type : Experimental / Science
 
ou?/where?: au sol - ground 
autographe?: non - noneDescription :  6 Dec. 2020. - GECAM - (Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor) is a constellation of two small X-ray and gamma-ray all-sky observatories to search for gamma-ray counterparts to gravitational wave events.
 
 The satellites are to be launched together on a CZ-11 rocket from China`s Xichang space center in December 2020.
 
 GECAM fast-tracked selection and development to take advantage of a new scientific opportunity, which Xiong Shaolin, an astrophysicist at CAS`s Institute of High Energy Physics in Beijing, and his colleagues identified a month after the U.S. Laser Interferometer Gravitational-Wave Observatory announced its historic detection of gravitational waves in February 2016 Keyword(s) :  #Probe,  #Rocket,  #Satellite,  SPACE REVUE : 07 - 2021 Last modified: 07/20/2021 @ 17h18
 
 
 
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CHINE  691 L |  16,-   |  
 
 
	
		
	
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		Space Event : GECAM
			 
		
		CHINE 690
		
 
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