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This file was copied from the English Language Wikipedia. The original description was:

Summary

Diagrams of three possible geometries of the universe: closed, open and flat from top to bottom, corresponding to a density parameter ${\displaystyle \Omega _{0}}$ which is greater than, less than or equal to 1. The closed universe is of finite size and, due to its curvature, traveling far enough in one direction will lead back to one's starting point. The open and flat universes are infinite and traveling in a constant direction will never lead to the same point.

Source: https://wmap.gsfc.nasa.gov/universe/uni_shape.html Author: NASA / WMAP Science Team

Licensing

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	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

Original upload log

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• (del) (cur) 04:52, 6 January 2006 . . en:User:Voyajer Voyajer ( en:User_talk:Voyajer Talk) . . 557x501 (52771 bytes) (Permission of NASA Official: Gary Hinshaw)