This page last edited by Haley Rodriguez, Fall 2012.

This page contains useful information about Emission Nebulae. Emission nebulae are clouds of dust and gas that are lit by young stars. The atoms in the dust cloud are energized by ultraviolet light from a nearby star and emit radiation as they fall back into lower energy. These nebulae are usually red because the predominant emission line of hydrogen happens to be red, but can also be other colors depending on the composition of the dust and gases of the nebula. (AAO, Emission Nebulae)

http://www.noao.edu/image_gallery/emission_nebulae.html This website was very informative, with many images of emission nebulae. The site is useful for identifying parts of a nebula. On the website,there are about 60 images with clearly labeled names.If you wanted to read a little bit about the object in the picture, all captions have a redirect link with more information available on that topic.


http://www.aao.gov.au/images/general/emission_frames.htmlThis website website was useful for finding emission nebulae in a constellation. The website provides a list of names of constellations, the emission nebula that would be included in it, and a picture of the nebula itself.


http://fusedweb.llnl.gov/CPEP/Chart_pages/5.Plasmas/Nebula/Emission.html This website was very good for explaining the composition of an emission nebula, formation processes, and final product. It also explains how you can see an emission nebula and why it produces the colors you see in an image.

HubbleSite This website features an archive of Emission Nebulae observed by NASA's Hubble Spacecraft. With some familiarity with astronomy, the link are easy to read and very clear. The newest pictures are from August of 2012, with some dating back as far as August of 1990. The site is overseen by NASA, so the information is trustworthy and valuable. The website is accurate as far as I can tell. There are many link to choose from underneath each picture, to learn more about the nebula shown, and these are part of the website. I, Haley Rodriguez, visited and reiewed this site on November 24th, 2012.

Swinburne Cosmos This website gives a detailed explanation of the inner workings of an Emission Nebula. You would need to take a class or two on astronomy to understand a lot of what they are talking about, or have a good understanding of chemistry to understand the chemical composition and reactions taking place to produce the light. The website does not list when it was last updated, however it appears up to date and all the information on it was accurate in comparison with other sites. The site is educational, run by Swinburne University of Technology. Throughout the definition and explanation of Emission Nebulae, there are many clickable links that will further explain keywords in the definition. These links are also part of the website and do not redirect you elsewhere. This site was reviewed by Haley Rodriguez on November 24th, 2012.

SeaSky: NebulaeThis site examines the different types of nebulae, explaining the composition of a basic nebulae and the particular features of an Emission Nebula. With basic understanding of astronomy, one could fairly easily understand this website and its explanations. This site does not contain a date for which it was last updated, however, the information is universal (no specifics about time) and all of the information is accurate. The website is run by an organization called Sea Sky, and in it's accuracy seems trustworthy. You are able to navigate to other parts of the website in the home bar at the top of the screen, however, the are no clickable links throughout the Nebulae page. This site was reviewed by Haley Rodriguez on November 25th, 2012.

C. S. Eligman This site, written by a professor of astronomy who graduated from UCLA, and now works at Long Beach Community College. He closely examines 3 different emission nebulae, with large pictures and detailed descriptions of their location, distance, and special features that make them stand out. This website is easy to understand, however may require minimal background in astronomy to understand. There is no date for which this site was last updated, however, the information is verifiable through other sites and is accurate. Considering the professors credentials, I would say this information is trustworthy. There are link in the home bar and a search bar, however there are no links throughout this particular page that examine Emission Nebulae further. This site was reviewed by Haley Rodriguez on November 25th, 2012.

Lake County Astronomical Society The last site I reviewed was a detailed explanation of why emission nebulae are most often colored red. The explanation is an easy read, and could help anyone who isn't terribly familiar with the astronomical terms because it provides good explanations for everything throughout the page. This page was last updated May 21st, 2012 at 1pm. There are link on the bottom and top of the page for more topics, which are included in the website. The information comes from an organization, The Lake County Astronomical Society in Illinois. The information is accurate and what I believe to be trustworthy. However, there are no pictures on this page and I feel that would have enhanced it quite a bit. This page was reviewed by Haley Rodriguez on November 26th, 2012.


Emission Nebula:

hh666_400.jpg
HH 666: “The Axis of Evil in the Carina Nebula”*


external image ic1795l.jpg
(Cited By Haley Rodriguez, Photo Credit: http://www.asahi-net.or.jp/~rt6k-okn/nebulae/ic1795l.jpg)