Spektr-RG is an X-Ray astronomy satellite `Спектр-РГ,. also called Spectrum-X-Gamma, SRG, SXG) is a Russian–German high energy astrophysics space observatory which was launched on July 13. 2019. It follows on from the Spektr-R satellite telescope launched in 2011.
This 2020 stamp from Russia shows the Spektr-RG.
By Nicholas Steggall
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