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Physicist Makes New High-Res Panorama of Milky Way
Piecing together 3000 individual photographs, a physicist has made a new high-resolution panoramic image of the full night sky, with the Milky Way galaxy as its centerpiece. Axel Mellinger, a professor at Central Michigan University, describes the process of making the panorama in the forthcoming issue of Publications of the Astronomical Society of the Pacific. An interactive version of the picture can viewed on Mellinger’s website: http://home.arcor.de/axel.mellinger/.
“This panorama image shows stars 1000 times fainter than the human eye can see, as well as hundreds of galaxies, star clusters and nebulae,” Mellinger said. Its high resolution makes the panorama useful for both educational and scientific purposes, he says.
Mellinger spent 22 months and traveled over 26,000 miles to take digital photographs at dark sky locations in South Africa, Texas and Michigan. After the photographs were taken, “the real work started,” Mellinger said.
Simply cutting and pasting the images together into one big picture would not work. Each photograph is a two-dimensional projection of the celestial sphere. As such, each one contains distortions, in much the same way that flat maps of the round Earth are distorted. In order for the images to fit together seamlessly, those distortions had to be accounted for. To do that, Mellinger used a mathematical model—and hundreds of hours in front of a computer.
Another problem Mellinger had to deal with was the differing background light in each photograph.
“Due to artificial light pollution, natural air glow, as well as sunlight scattered by dust in our solar system, it is virtually impossible to take a wide-field astronomical photograph that has a perfectly uniform background,” Mellinger said.
To fix this, Mellinger used data from the Pioneer 10 and 11 space probes. The data allowed him to distinguish star light from unwanted background light. He could then edit out the varying background light in each photograph. That way they would fit together without looking patchy.
The result is an image of our home galaxy that no star-gazer could ever see from a single spot on earth. Mellinger plans to make the giant 648 megapixel image available to planetariums around the world.
Bron: Chicago Journals.
[ Bericht 0% gewijzigd door Iblis op 03-11-2009 11:09:37 ]
Piecing together 3000 individual photographs, a physicist has made a new high-resolution panoramic image of the full night sky, with the Milky Way galaxy as its centerpiece. Axel Mellinger, a professor at Central Michigan University, describes the process of making the panorama in the forthcoming issue of Publications of the Astronomical Society of the Pacific. An interactive version of the picture can viewed on Mellinger’s website: http://home.arcor.de/axel.mellinger/.
“This panorama image shows stars 1000 times fainter than the human eye can see, as well as hundreds of galaxies, star clusters and nebulae,” Mellinger said. Its high resolution makes the panorama useful for both educational and scientific purposes, he says.
Mellinger spent 22 months and traveled over 26,000 miles to take digital photographs at dark sky locations in South Africa, Texas and Michigan. After the photographs were taken, “the real work started,” Mellinger said.
Simply cutting and pasting the images together into one big picture would not work. Each photograph is a two-dimensional projection of the celestial sphere. As such, each one contains distortions, in much the same way that flat maps of the round Earth are distorted. In order for the images to fit together seamlessly, those distortions had to be accounted for. To do that, Mellinger used a mathematical model—and hundreds of hours in front of a computer.
Another problem Mellinger had to deal with was the differing background light in each photograph.
“Due to artificial light pollution, natural air glow, as well as sunlight scattered by dust in our solar system, it is virtually impossible to take a wide-field astronomical photograph that has a perfectly uniform background,” Mellinger said.
To fix this, Mellinger used data from the Pioneer 10 and 11 space probes. The data allowed him to distinguish star light from unwanted background light. He could then edit out the varying background light in each photograph. That way they would fit together without looking patchy.
The result is an image of our home galaxy that no star-gazer could ever see from a single spot on earth. Mellinger plans to make the giant 648 megapixel image available to planetariums around the world.
Bron: Chicago Journals.
[ Bericht 0% gewijzigd door Iblis op 03-11-2009 11:09:37 ]
Daher iſt die Aufgabe nicht ſowohl, zu ſehn was noch Keiner geſehn hat, als, bei Dem, was Jeder ſieht, zu denken was noch Keiner gedacht hat.
Ga meteen kijken. 
De mens regeert de wereld niet om een ander tevreden te stellen maar om zichzelf tevreden te stellen.
Iblis, je moet even in de bronlink dat "&cookieset=1" weghalen. Ik krijg er nu een foutmelding op 
There are no things, but as a consequence there are as many things as we like
Done.quote:Op dinsdag 3 november 2009 11:01 schreef SpecialK het volgende:
Iblis, je moet even in de bronlink dat "&cookieset=1" weghalen. Ik krijg er nu een foutmelding op
Daher iſt die Aufgabe nicht ſowohl, zu ſehn was noch Keiner geſehn hat, als, bei Dem, was Jeder ſieht, zu denken was noch Keiner gedacht hat.
Dit is een foto van de Melkweg zoals je die vanaf de aarde ziet. Behalve dan dat je in Nederland eigenlijk vrijwel overal te veel lichtvervuiling hebt om de Melkweg makkelijk te kunnen zien.quote:Op dinsdag 3 november 2009 11:07 schreef Desunoto het volgende:
Waar zitten wij? In die vieze bruine wolk, de vuilnisbelt van de melkweg zeker?
Daher iſt die Aufgabe nicht ſowohl, zu ſehn was noch Keiner geſehn hat, als, bei Dem, was Jeder ſieht, zu denken was noch Keiner gedacht hat.
Mega!
Metalman. Maar ook ESF fan. Solo vakantiefietser met tentje. Dichter.
26-10 Attila/Eskimo Callboy (Amsterdam), 21-11 The Algorithm (Haarlem)
26-10 Attila/Eskimo Callboy (Amsterdam), 21-11 The Algorithm (Haarlem)
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