Vladimir Putin expressed gratitude to the team of the special astrophysical observatory of the Russian Academy of Sciences in Karachay-Cherkessia for their achievements in scientific activities and many years of conscientious work. The head of the republic, Rashid Tamerzov, announced this on the Telegram channel. It is the largest Russian astronomical center for ground-based observations of objects in the universe, located in the Zelenchuksky district. The Special Astrophysical Observatory of the Russian Academy of Sciences was founded on June 3, 1966. It is equipped with a BTA optical telescope with a primary mirror diameter of 6 meters and a radio telescope Rattan-600 (radio telescope of the Academy of Sciences) with a multi-element ring antenna with a diameter of 600 meters. BTA was the largest in the world until 1993, and now remains the largest in Eurasia.