description CTB 1 Overview
CTB 1 is a large, faint supernova remnant in the constellation Cassiopeia, identified through radio observations in 1960. It consists of an expanding shell of material produced by a stellar explosion and is also visible at optical wavelengths, especially through emissions from ionized oxygen and hydrogen. Amateur astrophotographers sometimes call it the Medulla Nebula because of the filamentary appearance revealed in long-exposure images.
help CTB 1 FAQ
How good is CTB 1?
CTB 1 scores 7.04/10 (Good) on Lunoo, making it a well-rated option in the Nebula category.
What are the best alternatives to CTB 1?
See our alternatives page for CTB 1 for a ranked list with scores. Top alternatives include: HB 21, Puppis A Supernova Remnant, G1.9+0.3.
How does CTB 1 compare to HB 21?
See our detailed comparison of CTB 1 vs HB 21 with scores, features, and an AI-powered verdict.
Is CTB 1 worth it in 2026?
With a score of 7.04/10, CTB 1 is a solid option in Nebula. See all Nebula ranked.
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