The Russian astrophysical orbital observatory Spektr-RG discovered a thermonuclear supernova in our galaxy. The recording sensitivity of the eROSITA telescope (one of the two telescopes onboard the Spectra-RG) makes it possible to find very rare and unusual sources of X-ray radiation in the celestial sphere.
One of these sources is a round object, the angular size of which is 8 times the apparent diameter of the Moon. The Russian astrophysicists who discovered this object gave it the name G116.6-26.1 in accordance with the coordinates in the sky. They believe that this is the remnant of a thermonuclear supernova that exploded 40,000 years ago.
Scientists emphasize that the discovery of an old thermonuclear supernova remnant in our galaxy is a rare event, only the fifth case in the entire history of observations.
In addition, G116.6-26.1 is not in the plane of the galaxy, where it would be expected, but at an impressive distance of 4 thousand light-years above it and 10 thousand light-years from the Sun. Supernova remnants have never been observed this far.
Scientists assume that all the material of the star, which was 1.4 times heavier than the Sun, was ejected by an explosion at a speed of about 3000 km/sec. The remnant now has a gigantic physical size with a diameter of about 600-700 light-years.