File:Surveying instrument - Röntgen-Gedächtnisstätte Würzburg - Würzburg, Germany - DSC04359.jpg - Wikimedia Commons
German X-Ray Telescope Takes First Images of Universe. Here They Are! | Space
eROSITA – the hunt for Dark Energy begins - DLR Portal
Radiological Physics: Röntgen- und Kernphysik für Mediziner und Biophysiker. Richard Glocker and Eckard Macherauch. Thieme, Stuttgart, Germany, ed. 2, 1965. xii + 520 pp. Illus. DM 69. | Science
ART-XC: Astronomical Roentgen Telescope – X-ray Concentrator
SODART TELESCOPE ON SPECTRUM-RONTGEN-GAMMA AND ITS INSTRUMENTATION 2. SODART
ESO Supernova Exhibition — How do astronomers see X-rays?
Spectrum-Roentgen-Gamma – Astrophysical project
ART-XC: Astronomical Roentgen Telescope – X-ray Concentrator
Spectrum-Roentgen-Gamma Telescope | Current Hunt
X-ray telescope | Britannica
German-Russian Astronomy Satellite Launches - Sky & Telescope - Sky & Telescope
ROSAT | satellite | Britannica
Spektr-RG/SRG
Bad Astronomy | eROSITA is now scanning the skies for X-rays | SYFY WIRE
New space telescope to create a 3D X-ray map of Universe
Searing Sun Seen in X-rays | NASA
X-ray astronomy - Wikipedia
ESO Supernova Exhibition — How do astronomers see X-rays?
Spectrum-Roentgen-Gamma
Spectrum Rontgen Gamma (Spektr-RG) X-ray telescope launched
Russia seeks to hijack German telescope on its X-ray spacecraft | Ars Technica
Spektr-RG Charts the Skies
ART-XC: Astronomical Roentgen Telescope – X-ray Concentrator
Space Telescopes | Historic Spacecraft
