- Messier 103, a young open star cluster in Cassiopeia, 8,000 ly away and is best observed mid October. ▼ Vixen VC200L | Canon EOS M100(a) '24 © Thomas Hanrath '24 · CC BY-NC-ND 4.0 #astrophotography #astronomy #deepsky #clearsky #telescope #photography #nature #space astrocamp.eu/en/messier-1...Oct 30, 2025 20:05