RUSSIA-Russia's only space radio telescope is no longer responding to commands from Earth, officials say.

Astro Space Centre chief Nikolai Kardashev said some of the Spektr-R satellite's communication systems had stopped working. But it was still transmitting scientific data, RIA Novosti news agency reports.

The telescope has been operational way beyond its expected five-year lifespan, Russia's space agency Roskosmos says. Specialists had repeatedly tried and failed to fix the lost connection, Mr Kardashev said.

Yuri Kovalev, head of research for the Spektr-R project, said the link went down on the morning of 11 January, but added that "there is still hope".