Red
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Home, Sweet Home
“Urban Colour” series.
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Rouge
“Urban Colour” series.
This image was accepted at the 125th Toronto International Salon of Photography.
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Helix Nebula
The Helix Nebula is a planetary nebula. It sits about 700 lightyears from Earth in the constellation of Aquarius, and spans about 3 lightyears across. As viewed from Earth, it is about half a full moon across.
Planetary nebulae, despite the name, have nothing to do with planets. They are formed at the end of life of a low to medium mass star, when all its fuel for nuclear fusion has been exhausted. The material in the outer layer of the star is ejected into space, while the core collapses into a white dwarf. The white dwarf continues to emit intense radiation, ionizing the ejected material and causing it to glow – hydrogen glows in red, while oxygen glows in blue-green.
Captured with my Skywatcher Quattro 8” telescope and QHY268M camera, with a total exposure time of 4 hours. Processed in HOO palette with RGB stars.
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Rosette Nebula
Like a red rose in the night sky, the Rosette Nebula is a favourite of astrophotographers. The Rosette Nebula is 130 light-years across and 5000 light-years from Earth. It is an H-II region where the hydrogen gas is undergoing active star formation. The hot young stars formed emit intense radiation that ionizes the hydrogen, creating the characteristic red glow of the nebula. The strong stellar winds from these stars also blow a hole in the gas cloud, and will eventually disperse the gas leaving an open cluster of stars at the centre.
This image was captured with 3 hours of exposure with an astro-modified DSLR and narrowband astrophotography filter.
