Space Luisa Fernanda
Space, astronomy, rockets and the physics of it all.
Tuesday, September 29, 2026 · UTC
Missions & Exploration

Study finds 84 unknown X-ray sources in six galaxies

A Nature Astronomy study reports 84 X-ray sources of unknown nature in six galaxies, including Andromeda and M101.

Luisa Marconi
Senior Space Correspondent
Share on X
Stands on 1 placed source from 1 publisher.
A study published in Nature Astronomy has identified 84 X-ray sources in six galaxies, including Andromeda and M101, whose nature is unknown.[1] The sources were detected using data from NASA's Chandra X-ray Observatory. The study does not classify the sources or suggest what they might be. The six galaxies in the study include Andromeda and M101. The sources remain unidentified.
Proof1 source · 1 publisher · signed
What this stands on
  1. A study published in Nature Astronomy identified 84 X-ray sources in six galaxies, including Andromeda and M101, using data from NASA's Chandra X-ray Observatory, and their nature is unknown. · Jurnalul
We could not place any of them by their address. None is an official body: that part stands on reporting, not on the underlying document or transcript.