Ra_Patera_Voyager.jpg - Wikipedia

Summary

Description Ra Patera Voyager.jpg	English: Io's volcanic plains are shown in this Voyager 1 image mosaic. Also visible are numerous volcanic calderas and lava flows. Ra Patera with its multihued lava flows is below and right of the mosaic's center. This scene is about 1300 miles (2100 km) long. The composition of Io's volcanic plains and lava flows has not been determined, but they could consist dominantly of sulfur or of silicates (such as basalt) coated with sulfur condensates. The bright whitish patches probably consist of freshly deposited SO2 frost.
Date	4 June 1998
Source	http://photojournal.jpl.nasa.gov/catalog/PIA00321
Author	NASA/JPL/USGS

	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."