Wikiversity

File:Planetary nebula k 4-55.jpg

Original file ‎(1,226 × 1,397 pixels, file size: 178 KB, MIME type: image/jpeg)

This is a file from the Wikimedia Commons. The description on its description page there is shown below.

Commons is a freely licensed media file repository. You can help.

Summary

Description
English: This planetary nebula is known as Kohoutek 4-55 (or K 4-55). A planetary nebula contains the outer layers of a red giant star that were expelled into interstellar space when the star was in the late stages of its life. Ultraviolet radiation emitted from the remaining hot core of the star ionizes the ejected gas shells, causing them to glow.

In the specific case of K 4-55, a bright inner ring is surrounded by a bipolar structure. The entire system is then surrounded by a faint red halo, seen in the emission by nitrogen gas. This multi-shell structure is fairly uncommon in planetary nebulae.

This Hubble image was taken by WFPC2 on May 4, 2009. The colors represent the makeup of the various emission clouds in the nebula: red represents nitrogen, green represents hydrogen, and blue represents oxygen. K 4-55 is nearly 4600 light-years away in the constellation Cygnus.
Français : La nébuleuse planétaire K 4-55 vue par le télescope spatial Hubble.
Date
Source
Author NASA, ESA and the Hubble Heritage Team (STScI/AURA).
Permission
(Reusing this file)
Public domain This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use.
The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag.

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

inception

4 May 2009

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current12:46, 23 July 2009Thumbnail for version as of 12:46, 23 July 20091,226 × 1,397 (178 KB)TryphonOriginal size, from http://imgsrc.hubblesite.org/hu/db/images/hs-2009-21-a-full_jpg.jpg.
08:07, 13 May 2009Thumbnail for version as of 08:07, 13 May 20091,123 × 1,280 (193 KB)Patrinet{{Information |Description={{fr|nébuleuse planetaire k45-55}} |Source=Nasa archivs |Date= |Author=Nasa/Hubble |Permission=Domaine public USA |other_versions= }} Category:Planetary nebulae <!--{{ImageUpload|basic}}-->

Global file usage

The following other wikis use this file:

Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

If the file has been modified from its original state, some details may not fully reflect the modified file.

Retrieved from "https://en.wikiversity.org/wiki/File:Planetary_nebula_k_4-55.jpg"