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NGC 896 - Heart Nebula The Heart Nebula is a large emission nebula in Cassiopeia, named for its heart-like shape. It's often paired with the nearby Soul Nebula. Distance: 7,500 light-years Apparent Size: 150' × 120' (2°) Constellation: Cassiopeia Object Type: Emission Nebula (IC1805) Key Features: - Heart-shaped outline - Contains open cluster Melotte 15 - NGC 896 bright knot (Fish Head) - Part of giant molecular cloud - Active star formation Best Imaging Season: September - February Optimal Integration: 15+ hours (Ha)