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> Planetary nebula Abell 21 in Gemini

Planetary nebula Abell 21 in Gemini

author: A.Block/MLSC/Univ.of Az/Novapix

reference: a-nep98-02601

Image Size 300 DPI: 24 * 26 cm

The Medusa Nebula (Abell 21 or PK205+14.1) is a very old planetary nebula located about 1500 light years away in the constellation of Gemini. It spans approximately 4 light years across. The burned out stellar cinder known as a white dwarf can be seen glowing blue (by virtue of its emitted heat) in the center of the nebula complex.

Keywords for this photo:

2009 - ABELL 21 - ASTRONOMY - DYING STAR - EVOLUTION - GEMINI - NEBULA - PLANETARY NEBULA - STAR - WHITE DWARF -