Horsehead Nebula

Edited By: Valerie Reategui
See Explanation.  Clicking on the picture will downloadthe highest resolution version available.
See Explanation. Clicking on the picture will downloadthe highest resolution version available.

“The Horsehead Nebula.” NASA, NASA, apod.nasa.gov/apod/ap171227.html.

SUMMARY:

The Horsehead nebula is a molecular cloud in the shape of a horsehead. It is actually a dark nebula that has diffused. It also goes by the scientific name Barnard 33. The red glow from the nebula comes from hydrogen gas. This gas was ionized by the sigma Orion, which is close to the nebula. the dark colors of the nebula are from thick dust. The Horsehead Nebula is located in Orion. The only reason it can be seen is because this dark molecular cloud is set against a bright pink nebula behind it.




Astronomy Picture Of The Day
https://apod.nasa.gov/apod/ap171227.html



See Explanation.  Clicking on the picture will downloadthe highest resolution version available.
See Explanation. Clicking on the picture will downloadthe highest resolution version available.


“The Horsehead Nebula.” NASA, NASA, apod.nasa.gov/apod/ap171227.html.
AUTHOR: Nasa
LAST UPDATED:
December 27, 2017
DATE REVIEWED:5/14/18
REVIEWED BY:
Valerie Reategui.
ACCURACY: The accuracy of this article was great. It would be expected from any article from nasa. The article is short, but has plenty of accurate informatioin down to the facts of what the nebula is made up of and how it was discovered.
Does the information seem accurate and up to date? Are there facts which contradict information from reliable sources or texts?
Be specific. Don't just say "Seems accurate." Cite examples.
READABILITY and CLARITY:
The audience should consist of people who are somewhat fluent in astronomy language. Some harder vocabulary is used and may be hard for grade school children to understand. It's a great article who wants quick facts about a subject on astronomy. If anyone older than middle school tried to read the article they could definitely find facts they understand. The flesch reading level is 49.6, and the grade level is 10.7. Definitely an article for educated readers.

National Optical Astronomy Observatory

URL:[[https://www.noao.edu/image_gallery/html/im0057.html]]
IMAGE:
[Horsehead]
[Horsehead]

“Horsehead Nebula.” National Optical Astronomy Obsrvatory, Sonoran Desert, www.noao.edu/about-noao.php.
AUTHOR: National Optical Astronomy Observatory
LAST UPDATED: April 12, 2018
DATE REVIEWED: May 14,2018
REVIEWED BY: Valerie Reategui
ACCURACY: This article was okay, it had some important information about the Nebula such as generic backgrounf info, but overall a reliable source.
READABILITY and CLARITY: The audience can be anyone, but is catered more to those who are familiar with astronomy terms. The article has lots of details of all different parts of the nebula that educated people could understand. It's not that easy to read because of all the specific terms and hard vocabulary. The flesch reading level is 27.4 and the grade level is 14. I would recommend this article for people who understand astronomy very well.








Constellation Guide:

URL:[[http://www.constellation-guide.com/horsehead-nebula-barnard-33/]]
IMAGE:
horsehead nebula,barnard 33
horsehead nebula,barnard 33

“Horsehead Nebula.” Constellation Guide, www.constellation-guide.com/wp-content/uploads/2014/01/Horsehead-Nebula-295x300.jpg.
AUTHOR: admin
LAST UPDATED: January 5, 2014
DATE REVIEWED: May 14, 2018
REVIEWED BY: Valerie Reategui
ACCURACY: The accuracy of this article was superb. It not only had the basic information but even about the stars around the nebula that will help the reader have a well rounded knowledge of the nebula's surrounding area.
READABILITY and CLARITY: The audience can really be anyone who is interested in learning more about the horse nebula and just a beginner in astronomy.. Its fairly easy to read and straight to the point. A lot of interesting facts and not to complicated of scientific terms. The Flesch reading scale is 40.1 and the grade level is 13.2. This articele is recommended to anyone who wants an easy read about the Horsehead nebula.













Universe Today:

URL:[[https://www.universetoday.com/44681/horsehead-nebula/]]

Image:

external image horseheaddetail.jpg
“Horsehead Nebula.” Universe Today, www.universetoday.com/wp-content/uploads/2009/09/horseheaddetail-1024x670.jpg.
AUTHOR: Jean Tate
LAST UPDATED: December 24, 2015
DATE REVIEWED: May 15, 2018
REVIEWED BY: Valerie Reategui
ACCURACY: This article is short and to the point, but that does not effect the information at all. Not only is there science information about the nebula, but also the history behind the nebula.
READABILITY and CLARITY: The audience the article is aimed at is definitely those who need a quick read on the horsehead nebula. Not that long of an article and can be read pretty quickly because of the easy language. Facts are relevant and should appeal to the reader. The flesch reading scale is 41.6 and the grade level is 14.4. A "to the point article" and a pretty good read overall.




















KenCroswell.com:





URL: http://kencroswell.com/HorseheadNebulaIsRotating.html
IMAGE:
external image HorseheadNebula.jpg
“Horsehead Nebula.” Kencroswell.com, 25 Jan. 2002, kencroswell.com/HorseheadNebula.jpg.
AUTHOR: Ken Croswell
LAST UPDATED: January 31, 2006
DATE REVIEWED: May 15, 2018
REVIEWED BY: Valerie Reategui
ACCURACY: Not only does this article contain accurate information about the basic information of the nebula but also does a little investigating into the rotating Horsehead nebula with evidence.
READABILITY and CLARITY:
This a great article for those people who want want just a little more than the basic information about the nebula. There is more information than the basic facts. The audience can dig deeper into the their research with this article. The article isn't hard to read, but it isn't easy either. The flesch reading scale is 44.8 and the grade level is level 11.1.