GPB_circling_earth.jpg

This image upscaled image with terrible compression artifacts. If a higher-quality image is available, please consider replacing this one ; otherwise, a replacement under a free license should be found or provided.

Please see Category:Image cleanup templates for templates used to mark images that only need a clean-up.

For more help, see Commons:Media for cleanup#Low quality images .

The factual accuracy of this illustration is disputed .
The grid representing the gravitational field/potential or space-time curvature is obviously qualitatively wrong (looks like a Gaussian instead of power-law).

Summary

Description GPB circling earth.jpg	Artist concept of Gravity Probe B orbiting the Earth to measure space-time, a four-dimensional description of the universe including height, width, length, and time.
Date	18 May 2008
Source	http://www.nasa.gov/mission_pages/gpb/gpb_012.html
Author	NASA
Permission ( Reusing this file )	Original work of NASA

Licensing

	This file is in the public domain in the United States because it was solely created by NASA . NASA copyright policy states that "NASA material is not protected by copyright unless noted ". (See Template:PD-USGov , NASA copyright policy page or JPL Image Use Policy .)
	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."

Summary

Licensing

Captions

Items portrayed in this file

depicts

spacetime

inception

18 May 2008