Deep-Sky Dreams: The Bubble Nebula

The far northern sky holds its richest region in Cassiopeia, a splendid area of bright Milky Way stars and gas. One of the greatest nebulae in the far north is NGC 7635, the Bubble Nebula, so named for its remarkable spherical bubble visible in images.  This object is an emission nebula with a reasonably highContinue reading “Deep-Sky Dreams: The Bubble Nebula”
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