|Here is another urban
image taken from my driveway. The conditions were less than perfect with very poor seeing and a
slight haze that made for a very bright sky. An Optolong L-enHance
light pollution filter was used for this image to get as much narrow
band H-alpha detail as I could given the conditions. Because of the way
the filter affects the colour of the image a fair amount of the
processing went into getting natural star colours and to prevent the
monochrome red look. There is quite a bit of detail in this one so it
is worth clicking on the image to zoom in and look around.
According to Wikipedia - The Heart Nebula, IC 1805, Sharpless 2-190, lies some 7500 light years away from Earth and is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. It was discovered by William Herschel on 3 November 1787. It is an emission nebula showing glowing ionized hydrogen gas and darker dust lanes.
The brightest part of the nebula (a knot at its western edge) is separately classified as NGC 896, because it was the first part of the nebula to be discovered. The nebula's intense red output and its morphology are driven by the radiation emanating from a small group of stars near the nebula's center. This open cluster of stars, known as Collinder 26 or Melotte 15, contains a few bright stars nearly 50 times the mass of our Sun, and many more dim stars that are only a fraction of our Sun's mass.
Click on the image to see a higher resolution version, then click again on the image to return to this page.