International Space Agencies – Missions and Discoveries

Spectrum-Roentgen-Gamma telescope to create a 3D X-ray map of Universe

Note4Students

From UPSC perspective, the following things are important :

Prelims level : SRG

Mains level : X Ray Telescope


  • A team of German-Russian scientists is all set to launch a space telescope, which will create a three-dimensional (3D) X-ray map of the universe and unveil unknown supermassive black holes, dark energy and stars.

Spectrum-Roentgen-Gamma (SRG) Telescope

  • The telescope will be launched into space on a Russian-built Proton-M rocket from the Baikonur Cosmodrome in Kazakhstan in June 2019.
  • The four-year mission will survey the entire sky eight times and track the evolution of the universe and dark energy, a mysterious repulsive force that is accelerating its expansion.
  • Besides, it also aims to detect up to three million supermassive black holes — many of which are unknown — and X-rays from as many as 700,000 stars in the Milky Way.
  • The telescope is the first to be sensitive to high-energy ‘hard’ X-rays and map the entire sky.
  • The SRG will also find how dark matter — the main engine of galaxy formation — is spread in the universe.
  • X-ray sky surveys have also been conducted by previous missions, but they were not able to map the entire sky, the report said.

Two X-ray telescopes:

  • A German-built eROSITA (Extended Roentgen Survey with an Imaging Telescope Array)
  • A Russian-built ART-XC (Astronomical Roentgen Telescope — X-ray Concentrator)
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