Comparison of sizes of objects with size order of magnitude 1e16m: ten light year radius circle with yellow arrow; Bubble Nebula (NGC 7635), left; Dumbbell Nebula (NGC 6853), right; one light year shell lower right with the smaller Cat's Eye Nebula (NGC_6543) and Barnard 68 adjacent. All distances and sizes to scale. No transparency version.
<a href="https://en.wikipedia.org/wiki/User:Paul_Stansifer" class="extiw" title="en:User:Paul Stansifer">Paul Stansifer</a>, <a href="//commons.wikimedia.org/wiki/User:84user" title="User:84user">User:84user</a>, Robert J. Vanderbei, NASA, Matt Bobrowsky, Orbital Sciences Corporation, ESO, ESA, HEIC, and The Hubble Heritage Team (STScI/AURA) (see "source" above and "Licensing" below)
2008-12-07
<p>derived from Paul Stansifer's POV-Ray source files (see below), by me, 84user, using <a href="https://en.wikipedia.org/wiki/en:POV-Ray" class="extiw" title="w:en:POV-Ray">w:en:POV-Ray</a>, and <a href="https://en.wikipedia.org/wiki/en:IrfanView" class="extiw" title="w:en:IrfanView">w:en:IrfanView</a>.
</p><p>84user's contribution (inside POV-Ray files: adjusting coordinates, changing light source and other parameters) is public domain and source files used are described at <a href="//commons.wikimedia.org/wiki/User:84user/Size_comparison" title="User:84user/Size comparison">User:84user/Size comparison</a>.
</p><p>Physical information is based on the Wikipedia articles and elsewhere (see POVRay source files) about the respective lengths.
</p>
Paul Stansifer's contributions to this image (POV-Ray code) are available under the GPL, v. 2, and other licenses. See <a href="https://en.wikipedia.org/wiki/User:Paul_Stansifer/Size_comparison" class="extiw" title="en:User:Paul Stansifer/Size comparison">User:Paul Stansifer/Size comparison</a> for more details and the other licenses.