NGC 2244 Satellite Cluster / NGC 2237 The Rosetta Nebula - telescope processed image. NGC 2244: The Satellite Cluster This open cluster is just 2 million years old; its massive O-type stars emit stellar winds so powerful they’ve bored a 50-light-year hole in the nebula's core.
NGC 2244 Satellite Cluster / NGC 2237 The Rosetta Nebula - unprocessed image. NGC 2237: The Rosette Nebula Spanning 130 light-years, this floral-shaped emission nebula glows red because radiation from central stars ionizes the cloud's vast reserves of hydrogen gas.
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