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Explorations an Introduction to Astronomy Thomas T. Arny | ||||||||
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Instructor
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Chapter
Images
Chapter 13, Figure 16
Figure
13.16
Photographs
of several planetary nebulas. (A) The Helix nebula. (Courtesy Anglo-Australian
Observatory/photograph by David Malin.) (B) The Ring nebula. (Courtesy Hubble
Heritage Team (AURA, STScI/NASA).) (C) The Butterfly Nebula (Bruce Balick,
University of Washington. Vincent Icke, Leiden University (The Netherlands).
Garrelt Mellema, Stockholm University/NASA.). Notice the central star in each.
Other stars that look as if they are inside the shell are foreground or background
stars.
