#sdso1 — Public Fediverse posts
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Faint blue arcs stretch across the sky near Andromeda. But they aren’t part of that galaxy.
SDSO 1 is now recognized as a Ghost Planetary Nebula, a newly defined class. It belongs to our own Milky Way.
Discovered by amateurs. Confirmed with 550 hours of data.
📅 Aug 4, 2025
📷 Patrick Ogle et al.
#SDSO1 #PlanetaryNebula #Andromeda #DeepSky #Astrophotography #StellarSnap