Deep Sky
Page 7


The following images were taken on 5 & 6 May 11.  Spring is the time to concentrate on galaxies and that is what we are trying to do.


NGC 2903
This galaxy is in the constellation Leo with a 9.6 magnitude.  As you can see, this is a spiral galaxy classified as as: SBbc.  William Herschell is credited with it discovery in 1784.   

Particulars on this image HyperStar, 120 - 20 second images stacked.


M101
Pinwheel Galaxy
The constellation Ursa Major holds this nearly face on spiral galaxy.  A diameter of over 170,000 light-years and approx 27 million-light years from here.   M101 has a magnitude of 7.9 and one I'm particulary happy with.  This image is 'only' 60 images stacked and I'm sure we will get this one again in the near future.

Bill's Moon
As the title indicated, Lil' Bill would not leave us alone until we imaged the moon.  Bill tends to march to the beat of a different drummer, but he does OK, most of the time.  He was awarded teacher of the Year here at Zuni High this year so we congradulate him for a job well done, but he'll be very hard to live with for the rest of the school year.



NGC 4567 &68

The two galaxies at the lower left 67-68 are also known as The Siamese Twins.  As they are a magnitude 11.3, the galaxy just above it is ngc 4564 and is 14.4 magnitude.  Once I find out the galaxy at the upper right corner I will indicate it as well.

NGC 7635
Constellation Cassiopeia
Friedrich Herschel in 1787,this is an example of an emission nebula.  Stellar wind created the 'bubble' by a huge young central star SAO 20575. The nebula is near a giant molecular cloud.  
This image taken on 18 Oct 11, consists of 30, 20sec images stacked.  We will be taking another look at this nebula for a better shot.



NGC 0896

This is a emission nebula showing glowing gas and darker dust lanes.  This nebula is formed by plasma of ionized hydrogen and free electrons.

The knot is classified as ngc 896 because it was the first part of this nebula to be discovered.

The intense red output and its configuration is from radiation emanating from an open cluster near the nebulas center.  This open cluster is known as Melotte 15.   It contains some bright starts nearly 50 times the mass of our Sun., an many more dim stars that are only a fraction of our Sun’s mass.  Melotte 15 also has a microquasar that was expelled millions of years ago.


NGC 281

Is in the constellation of Cassiopeia and part of the Perseus Spiral Arm.   It is also part of the open cluster IC1590.  This nebula is also known as the Pacman Nebula for its resemblance to the videl game character.

This nebula was discovered in 1883 by E.E. Barnard,  described it as  "a large faint nebula, very diffuse.




NGC 6960
The Witch’s Broom
Diffused Nebula
This nebula was discovered by William Herschel, on  5 Sep 1784.   This image is just a part of the nebula, the most famous part is associated with 52 Cygni, which is just out of the image.  We will have to try and get the rest of this bad boy.  Asked why it looks like this?  The explanation is that shock waves are so thin, less than one part in 50,000 of the radius, meaning the shell is only visible when viewed exactly edge-on, giving the shell the appearance of a filament.  Wave action or undulations in the surface of the shell show up as filamentary images appearing to be intertwined.   
Wikipedia
Located in the constellation Cygnus, the witches broom, or Vail Nebula is a heated and ionized gas and dust cloud.  A supernova exploded some 5-8,000 years ago and still expanding it now covers 3 degrees in diameter or 36 times the area of the full moon!  Astronomers figure it is about 1470 light- years from earth. Emissions indicate the presence of oxygen, sulfur, and hydrogen.