Mark McCaughreanJan 9, 2023

Well now, that’s a mighty strange thing 😳

A previously unknown, very extensive, low-surface brightness nebulosity near the Andromeda galaxy, M31, seen in the [OIII] emission line at 5007Å.

Discovered by Drechsler et al. in autumn last year using a 106mm refractor, showing again that not all astronomy needs the biggest telescopes 🔭

Perhaps in the halo of M31 & linked to its stellar streams? 🧐

More below 👇

https://iopscience.iop.org/article/10.3847/2515-5172/acaf7e

#astrodon #space #astronomy

Show threadDuncan Waldron
@markmccaughrean It does happen, but it's never not fascinating/surprising when such a modest instrument features in a discovery like this.
Jan 10, 2023 at 12:07pmWeb