Image: 1e18m comparison 1000 light years nebula clusters

Description: Comparison of lengths and sizes with size order of magnitude 1e18m: thousand light year radius circle with yellow arrow and 100 light year circle at right with globular cluster Messier 5 within and Carina Nebula in front; globular cluster Omega Centauri to left of both; part of the 1400 light year wide Tarantula Nebula fills the background. All distances and sizes approximately to scale. No transparency version.
Title: 1e18m comparison 1000 light years nebula clusters
Credit: derived from Paul Stansifer's POV-Ray source files (see below), by me, 84user, using w:en:POV-Ray, and w:en:IrfanView. See licensing for sources of images. 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 User:84user/Size comparison. Physical information is based on the Wikipedia articles and elsewhere (see POVRay source files) about the respective lengths. Paul Stansifer's contributions to this image (POV-Ray code) are available under the GPL, v. 2, and other licenses. See User:Paul Stansifer/Size comparison for more details and the other licenses.
Author: Paul Stansifer, User:84user, NASA/JPL-Caltech/B. Brandl (Cornell & University of Leiden), ESA, HST, (see "source" above and "Licensing" below)
Usage Terms: Public domain
License: Public domain
Attribution Required?: No