Dave Osborne's Astro Images
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Scan day: 17 February 2014 UTC
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Description: Deep sky, solar system and comet galleries, and equipment details.
Dave Osborne's Astro Images Amongst the nebulae regions are those areas that are predominantly Emission nebulae. The atoms in the clouds of high temperature gas are energized by ultraviolet light from a nearby star and emit radiation as they fall back to lower energy states (in much the same way as a neon light). Other types of nebulae also emit specific wavelengths of energy based on the elements and mechanisms present in their structure. Narrow band images use special filters that pass specific wavelengths of light. These wavelengths are chosen to match the energy emitted by elements present in the nebulae. The list below gives some of the predominant elements and their emitting wavelengths.
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| Page title: | Dave Osborne's Astro Images |
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| NS | Name servers: ns33.1and1.co.uk 217.160.80.150 2001:08d8:00fe:0053:0000:d9a0:5096:0100 ns34.1and1.co.uk 217.160.81.150 2001:08d8:00fe:0053:0000:d9a0:5196:0100 |
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| Date | Last updated: 26-Feb-2013 Expiry date: 27-Feb-2015 |