The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. It constitutes the visible portions of the Cygnus Loop (radio source W78, or Sharpless 103), a large but relatively faint supernova remnant. The source supernova exploded some 5,000 to 8,000 years ago, and the remnants have since expanded to cover an area roughly 3 degrees in diameter (about 6 times the diameter, or 36 times the area, of the full moon). The distance to the nebula is not precisely known, but Far Ultraviolet Spectroscopic Explorer (FUSE) data supports a distance of about 1,470 light-years.[2]

The Hubble Space Telescope captured several images of the nebula. The analysis of the emissions from the nebula indicate the presence of oxygen, sulfur, and hydrogen. This is also one of the largest, brightest features in the x-ray sky.

Technical data of the photo :
 

Telescope : Takahashi FSQ 106

Mount :  NEQ6

CCD camera QSI WSG 683

Guiding camera : meade DSI I 
Frames : 8 hours for Ha και 7 hours for Ο.

Skyros Island, Greece, September  2013

 

A four parts mosaic of the Western and Eastern Veil nebula.

 

Part A (right up, Western Veil)

Ha : 8x900 bin1, 24x300s bin2 

O :  6x900 bin1, 8x240s bin2 

S :  4x600s bin2, 10x480s bin2

RGB : 8x300s bin1 each

 

Part B (right down, Western Veil)

Ha : 21x300s bin2, 14x900s bin1

O : 7x900 bin1, 10x240s bin2

S : 6x600s bin2, 6x480s bin2

RGB : 8x300s bin1 each

 

Part C (left up, Eastern Veil)

Ha : 10x900 bin1, 26x300s bin2 

O : 13x240s bin2  

S : 6x600s bin2, 7x480s bin2

RGB : 8x300s bin1 each

 

Part D (left down, Eastern Veil )

Ha : 21x300s bin2, 15x900s bin1

O : 6x900 bin1, 13x240s bin2

S : 13x600s bin1, 6x480s bin2

RGB : 6x300s bin1 each

 

Scope : Takahashi FSQ 106 ED

Mount : NEQ6

Camera : QSI 683 WSG

Frames aquired in summer of 2013 in Skyros Island, Greece

Proccessed in 2015, In pixinsight and photoshop