Deep-Sky Dreams: The Lemon Slice Nebula

Of the approximately 3,000 planetary nebulae known in the galaxy, most are asymmetrical. But one planetary in Camelopardalis, just 7.5° from Polaris, is the poster child for symmetry.  The Lemon Slice Nebula (IC 3568) is a young planetary spanning only some 0.4 light-year. Its central star is dying and glows feebly at magnitude 12.3. The nebulaContinue reading “Deep-Sky Dreams: The Lemon Slice Nebula”
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