The Spektr-R radio telescope at Baikonur Space Center, within the integration and test complex of Launch Pad No.31.Photo: RIA Novosti (Wikimedia Commons)Russia’s only orbiting space radio telescope, Spektr-R (RadioAstron), has stopped responding to the spacecraft’s control staff, the BBC reported Saturday, though Astro Space Centre chief Nikolai Kardashev told the BBC that it is still…