Wow! signal

https://en.m.wikipedia.org/wiki/Wow!_signal

Astronomical Radio Source
Galactic Center Radio Transients (GCRT)

https://en.m.wikipedia.org/wiki/Astronomical_radio_source

The Wow! signal was a strong narrowband radio signal detected on August 15, 1977, by Ohio State University's Big Ear radio telescope in the United States, used to support the search for extraterrestrial intelligence. The signal appeared to come from the direction of the constellation Sagittarius and bore the expected hallmarks of extraterrestrial origin.

The galactic coordinates for the positive horn are [l=11.7°, b=−18.9°], and for the negative horn [l=11.9°, b=−19.5°], both being therefore about 19° toward the southeast of the galactic plane, and about 24° or 25° east of the galactic centre. The region of the sky in question lies northwest of the globular cluster M55, in the constellation Sagittarius, roughly 2.5 degrees south of the fifth-magnitude star group Chi Sagittarii, and about 3.5 degrees south of the plane of the ecliptic. The closest easily visible star is Tau Sagittarii.

..

1977-2019=42

..

In the 2000s, three Galactic Center Radio Transients (GCRTs) were detected: GCRT J1746–2757, GCRT J1745–3009, and GCRT J1742–3001.[8] In addition, ASKAP J173608.2-321635, which was detected six times in 2020, may be a fourth GCRT.[9][8]

Region around the Galactic Center

In 2021, astronomers reported the detection of peculiar, highly circularly polarized intermittent radio waves from near the galactic center whose unidentified source could represent a new class of astronomical objects with a GCRT so far not "fully explain[ing] the observations".

..

Strange radio waves coming from the heart of the Milky Way stump scientists

https://edition.cnn.com/2021/10/12/world/strange-radio-waves-milky-way-scn/index.html

We found a mysterious flashing radio signal from near the centre of the galaxy

https://phys.org/news/2021-10-mysterious-radio-centre-galaxy.html

Discovery of ASKAP J173608.2–321635 as a Highly Polarized Transient Point Source with the Australian SKA Pathfinder

https://iopscience.iop.org/article/10.3847/1538-4357/ac2360

Something Mysterious Near The Galactic Center Is Flashing Radio Signals

https://www.sciencealert.com/something-near-the-galactic-centre-is-flashing-radio-signals-and-we-don-t-know-what-it-is