This closeup of the Horseheat image shows not only the great Horsehead sorroundings but also the neglected colorful nebula NGC 2023 (at lower left...) NGC 2023 is 4 light years in diameter making it one of the largest reflection nebulae ever discovered! 16" F8 Hypergraph FLI Proline 16803 ASA DDM Mount L - RGB image Color - 20 min per channel Ha - 2 Hrs Total of 3 Hrs Imaged from Tivoli farm, Namibia