Amateur astronomer shoots thousands of images into a large galactic mosaic

SEATTLE — Nick Risinger has always gazed up at the sky. But last year the amateur astronomer and photographer quit his day job as a Seattle marketing director and lugged six synchronized cameras about 60,000 miles to capture an image of the entire night sky.

With the help of older brother Erik and father, Tom, Risinger, 28, set up his rack of cameras in high-elevation locales in the western United States and South Africa, timing photo shoots around new moons when nights were long and dark. He programmed his six cameras to track the stars as they moved across the sky and simultaneously snapped thousands of photos.

He then stitched 37,440 exposures together into a spectacular, panoramic survey sky that he posted online two weeks ago. The photo reveals a 360-degree view of the Milky Way, planets and stars in their true natural colors. Viewers can zoom in on portions of the 5,000-megapixel image to find Orion or the Large Magellanic Cloud.

"I wanted to share what I thought was possible," said Risinger, a first-time astrophotographer. "We don't see it like this. This is much brighter. On a good night in Seattle, you'll see 20 or 30 stars. This, in its full size, you'll see 20 to 30 million. Everything is amplified."

Other sky surveys have preceded this one, including the Digitized Sky Survey, a source for Google Sky. Many serve scientific purposes and were shot in red and blue to measure the temperature of stars, Risinger said. He shot in a third color, green, to give the photo added depth and richness, he said.

"This is not a scientifically useful image. This is for educational and artistic appreciation," Risinger said, adding that he wasn't motivated by money but hopes to sell prints and other products to keep his website running.

Risinger's travels took him to dark places where light pollution was low and to higher altitudes where there was less water vapor — to the desert near Tonapah, Nev., near the Chiricahua Mountains in Arizona, near Fort Davis, Texas, and Lassen National Forest in California. He found himself staking out stars in freezing temperatures in Telluride, Colo., and amid stars in South Africa where none of the constellations were recognizable to his northern hemisphere-trained eyes.

Night sky

To see Nick Risinger's spectacular

survey sky, go to skysurvey.org.

Amateur astronomer shoots thousands of images into a large galactic mosaic 05/12/11 [Last modified: Thursday, May 12, 2011 10:42pm]

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