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Location / Date: |
Eggersdorf, GER / 13.+ 14.+21.+ 25.+ 27. September 2016 |
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Telescope/ Lens: |
10" f/4 ONTC Newton |
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Mount: |
Celestron CGE GPS |
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Camera: |
Atik 383L+ |
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Exposure time: |
25x 1800" Astronomik Ha 6nm 21x 1200" Astronomik [OIII] 12nm 21x 1200" Astronomik [SII] 12nm |
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Total exposure: |
26,5 hours |
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Description: |
This detail view of this much larger emission nebulae is showing several smaller open clusters like Cr 34 Cr 632 and Cr 634. W5 is a radio source within the nebula which has an apparent diameter of 4 times the full moon. It lies in a distance of approximately 7500 light years from our solar system in the Perseus-arm of our Milkyway in the constellation of Cassiopeia. Like in other star star nursery regions, like e.g. in the Orion Nebula or in the Carina Nebula huge hollows, created by radiation and stellar winds of the biggest stars in that region.
According to the theory of triggered star formation, gas is compressed at the edges of those hollows which is initiating a chain of consecutive star formations within the nebula. Because the shock front is moving from the centre towards the edges and new star s are formed close to the shock front, older stars can be found in the centre while younger stars are located more to the edges.
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Image recording: |
Frank Iwaszkiewicz |
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Image processing: |
Frank Iwaszkiewicz |