Target: M33 - Triangulum Galaxy
Telescope: Orion 8"
Camera: Canon 40D (modified)
Exposures: 82x120s (2.7h) @ ISO1600
Framing: North is Right
Location: Mocksville, NC
Start Time: 9:00PM
End Time: 1:00AM
Captured with Nebulosity, stacked using DeepSkyStacker, processed in Photoshop.
This is a 3x Dither and crop from the larger M33 image
is a H II region
inside the Triangulum Galaxy
. It was discovered by William Herschel
on September 11, 1784. It is one of the largest H II regions in the Local Group
of galaxies; at the galaxy's estimated distance of 2.7 million light-years
its longest diameter is roughly 1500 light-years (460 parsecs
), over 40 times the size of the visible portion of the Orion Nebula
. It is over 6300 times more luminous
than the Orion Nebula, and if it were at the same distance it would outshine Venus
. Like all emission nebulae
, its gas is ionized
by a cluster of massive stars
at its center.