File:Active Galactic Nucleus Model.png

This is a file from the Wikimedia Commons. Information from its description page there is shown below.
Commons is a freely licensed media file repository. You can help.

DescriptionActive Galactic Nucleus Model.png	English: The image shows a model of an active galactic nucleus. The central black hole is surrounded by an accretion disk, which is surrounded by a torus. The broad line region and narrow line emission region are shown, as well as jets coming out of the nucleus.
Source	http://imagine.gsfc.nasa.gov/Images/basic/xray/agn.gif
Author	NASA

File:Active Galactic Nucleus Model.png

Summary

Licensing

Original upload log

Captions

Items portrayed in this file

depicts

copyright status

public domain

media type

image/png

checksum

9f7754632301d4580ae3f132c978522371982218

data size

38,274 byte

height

236 pixel

width

288 pixel

File history

File usage

Global file usage

	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."