Anai Rojas-Spring 2011
Reflection Nebula
A reflection nebula is considered to be cloyds of dust tha glow because of the light reflecting from stars that are near by. The energy from the stars nearby is not strong enough to cause ionization in the gas of the nebula but its brigtness is stong enough to make the dust visible.A reflection nebula is mostly blue due to the wavelenghts of the blue light.
witches_face.jpg
The Witch head, caused by the bright star Rigel, in the constellation Orion.
A reflection nebulae and an emmision nebulae are seen together at times which gives them the name of diffuse nebulae. Many of the reflection nebulas can be seen around the stars of the Pleiades.(http://fusedweb.pppl.gov/CPEP/Chart_Pages/5.Plasmas/Nebula/Reflection.html)
reflection_nebula_in_pleiades.jpg
Reflection Nebula in the Pleiades (IC349). This Nebula is about 100 light years from Earth.


refection_nebula.jpg
Reflection Nebula in the Orion.




Here are some links to websites that can go into fuller detail about Reflection Nebulas, or Nebulas in general:

1. The encyclopedia of science. This is a website that gives a brief explanation of what a Reflection Nebula is, with an image of a Nebula. This site is aged for older students or adults.
http://www.daviddarling.info/encyclopedia/R/reflectionneb.html

2. This website is called Answers.co, and it gives a large definition of what a reflection Nebula is. This site can be for a person(s) of any age interested in Reflection Nebula.
http://www.amswers.com/topic/reflection-nebula

3. A NASA Government official website, showing viewers Reflection Nebulas of the day. Kids can enjoy this site due to the pictures, and students or adults can get useful information. http://apod.nasa.gov/apod/reflection_nebulae.html


4. This is a link from NASA’s home site. It gives a great description of the Reflection Nebula located in the Constellation Orion. The same image is shown above, and it explains that the picture came from the Hubble Space Telescope. I believe an advanced middle school student and above could get useful information from this site. http://www.nasa.gov/multimedia/imagegallery/image feature 701.html

5. This a website that explains what a reflection nebula is. It also names the most known reflection nebulas, you can click on them and it will give you a brief description about each of them.
http://www.knowledgerush.com/kr/encyclopedia/Reflection_nebula/

6. On this website it specifically speaks about reflection nebula : NGC 1999, explains throughly what it is. It also has other links to other nebulas.
http://www.nightskynation.com/objects/nebulae/reflection-nebula-NGC-1999
7. This is a good website because it offers insite to many other nebulas and information about eah of them, along with an image gallary.
http://www.noao.edu/image_gallery/reflection_nebulae.html

8. This is another website that explains different types of nebulae including reflection nebulas.
http://astro.nineplanets.org/twn/types.html

9. This website speaks about reflection nebula Messier 78. Goes into detail about what it is.
http://www.universetoday.com/83338/stunning-new-look-at-reflection-nebula-messier-78/

Adding to: Tyler Batsell

"NGC 1999"


With all this information shared, I decided to focus on one of the more popular reflection nebulas called NGC 1999. December of 1999, after astronuants repaired the Hubble Space Telescope, it took off for the Hubble Heritage Project. It snapped this picture of the NGC 1999 located in the constellation Orion.

refection_nebula.jpg NGC%201999A.jpg

Known as the first Herbig-Haro (as jets of gas are being ejected from very young stars). It actually doesn't put off any light of it's own. It is lighten up by a white star by the name of V380.

V380

  • It being a white star it comes in at about 10,000 degrees celsius, twice the size of our sun
  • Its mass coming in pretty decent being 3.5 the times of our sun.
  • Its location is approximately 1500 light years away
  • NASA figures that the star is very young due to cloud of dust from birth (seen in the nebula)
  • Towards the right center of the nebula, there is a dark cloud (Ominous) which is made up of cold molecular gas and dust so thick that it blocks light from coming through. Seeming that this is located in front of NGC 1999.
  • This is also called a "Bok Globule". This is where new stars are forming inside the dense gas and dust compressing together.
  • ESA's Herschel infrared space telescope was able to locate a hole in the side of the nebula.
  • This could be a surprising discovery into the end of the star forming process