Posts Tagged ‘mind-blowing space photos’

Reader Photo: Stunning Interactive Sky Image

27 Apr

This stunning 360 degree panorama of the night sky was stitched together from 37,000 images by a first-time astrophotographer.

Nick Risinger, a 28-year-old native of Seattle, trekked more than 60,000 miles around the western United States and South Africa to create the largest-ever true-color image of the stellar sphere. The final result is an interactive, zoomable sky map showing the full Milky Way and the stars, planets, galaxies and nebulae around it.

“The genesis of this was to educate and enlighten people about the natural beauty that is hidden, but surrounds us,” Risinger said.

The project began in March 2010, when Risinger and his brother took a suite of six professional-grade astronomical cameras to the desert in Nevada. By June, Risinger had quit his job as a marketing director for a countertop company to seek the darkest skies he could find.

Every night, Risinger and his father set up the cameras on a tripod that rotates with Earth. The cameras automatically took between 20 and 70 exposures each night in three different-color wavelengths. Previous professional sky surveys (including the Digitized Sky Survey of the 1980s, which is the source for the World Wide Telescope and Google Sky) shot only in red and blue. Including a third color filter gives the new survey a more real feeling, Risinger said.

“I wanted to create something that was a true representation of how we could see it, if it were 3,000 times brighter,” he said.

‘I wanted to create something that was a true representation of how we could see it, if it were 3,000 times brighter.’

Risinger sought out dry, dark places far from light-polluting civilization. Most of the northern half of the sky was shot from deserts in Arizona, Texas and northern California, although Risinger had one clear, frigid night in Colorado.

“It was January and we were hanging out in Telluride waiting for the weather to clear in Arizona or Texas,” he said. “Finally we realized the weather was hopeless down south, but it was perfectly clear where we were.” They drove an hour away, set up near a frozen lake, and sat in their car with the heat off for 12 hours as the temperature outside dropped to minus 6 degrees Fahrenheit.

“I would have loved to turn the car on for heat, but I was afraid the exhaust would condense on the equipment and make a shutter freeze or ice up the lenses,” Risinger said. “Certainly it was the coldest I’ve ever been, but I’ve still got all 10 toes and fingers.”

The southern hemisphere was captured in two trips to South Africa, not far from the site of the 11-meter Southern African Large Telescope. While there, Risinger and his father stayed with a sheep farmer who also watched the skies with his own amateur telescope.

Back in Seattle, Risinger used a combination of standard and customized astrophotography software to subtract noise from the cameras, stack the three colors on top of each other, link each picture to a spot on the sky and stitch the whole thing together. He taught himself most of the techniques using online tutorials.

Risinger plans to sell poster-sized prints of the image from his website and is looking for someone to buy his cameras, but otherwise has no plans to make money from his efforts. He wants to make the panorama available to museums and planetariums, or modify it for a classroom tool.

“When Hubble shoots something, it’s a very small piece of the larger puzzle. The purpose of this project is to show the big puzzle,” he said. “It’s the forest-for-the-trees kind of concept. Astronomers spend a lot of their time looking at small bugs on the bark. This is more appreciating the forest.”

Risinger sets up his cameras in Colorado.

Images: Nick Risinger

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Best Mars Images From Orbiter’s First 5 Years

10 Mar
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Dust-Devil Tattoo

NASA's prolific Mars Reconnaissance Orbiter turns five Earth years old Thursday.

Since settling into orbit around the Red Planet on March 10, 2006, MRO has transmitted more data to Earth -- 131 trillion bits and more than 70,000 images so far -- than all other interplanetary missions combined.

After the orbiter finished all its initial science objectives in the first two years, NASA extended its lifetime twice. The extra time let MRO watch Mars change over two-and-a-half Martian years, giving a new picture of a shifting, dynamic planet.

"Each Mars year is unique, and additional coverage gives us a better chance to understand the nature of changes in the atmosphere and on the surface," said Rich Zurek of NASA's Jet Propulsion Lab in a press release. "We have already learned that Mars is a more dynamic and diverse planet than what we knew five years ago. We continue to see new things."

MRO carries six science instruments, including radar that peels back the layers of the Martian surface, a spectrometer that has mapped the mineral content of three-quarters of the planet, and a weather camera that monitors clouds and dust storms.

But the show stopper is the HiRise camera (High Resolution Imaging Science Experiment), which can resolve features the size of a beach ball from 180 miles away.

To date, HiRise has snapped more than 18,500 close ups of Mars' canyons, craters and dunes. In honor of MRO's fifth birthday, here are some of our favorites.


Dust-Devil Tattoo

These twisty trails were traced by dust devils, spinning columns of rising air that pick up loose red dust grains and reveal darker, heavier sand beneath. Dust devils have been blamed for unexpectedly cleaning off the Mars rovers' solar panels. This image was taken Aug. 24, 2009.

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Images: NASA/JPL/University of Arizona

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Solar System’s Deepest Canyon Sinks Miles Into Mars

08 Oct

Mars Valles Marineris rift valley

On the Martian surface, the mountains are high and the canyons are low. Really, really low.

Not only is the martian volcano Olympus Mons the highest peak in the solar system, Melas Chasma, the canyon pictured above, is the deepest in the solar system. In this image from the European Space Agency’s Mars Express orbiter, the valley on the left (darker area) sits a whopping 5.6 miles below the plateau on the right (lighter area).

Compared to the average shape of Mars, known as the “aeroid,” the canyon floor sinks down about 3.1 miles. Planetary scientists would love to use sea level measurements to describe Martian surface features, but there’s no ocean on the red planet anymore and any signs of an ocean are long since warped by millions of years of surface deformation.

The photo above covers about 7,700 square miles, or about the size of New Jersey, which makes it only a tiny postage stamp of Mars’ deepest, longest and most prominent scar — the 2,500-mile-long Valles Marineris rift valley (below).

Valles Marineris rift copyright of JPL

ESA also released the following 3-D rendering of Melas Chasma in addition to the satellite imagery, revealing the valley in all its topographical glory (via Nancy Atkinson at Universe Today).

Melas Chasma 3-D

Images: 1) Melas Chasma – high-resolution image, ESA/DLR/FU Berlin (G. Neukum), 2) Viking 1 and 2 orbiter image collage of Valles Marineris canyon – high-resolution image. Courtesy NASA/JPL-Caltech, 3) Melas Chasma – high-resolution image, ESA/DLR/FU Berlin (G. Neukum),

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