Friday, 03 May 2024

Space News: Citizen scientists making incredible discoveries

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In this image, the Voorwerp floats near a spiral galaxy. Credit: NASA/ESA Hubble Space Telescope.

 

 


“Somewhere, something incredible is waiting to be known,” wrote Carl Sagan.


And now you can be the one to find it, thanks to Zooniverse, a unique citizen science Web site.


Zooniverse volunteers, who call themselves “Zooites,” are working on a project called Galaxy Zoo, classifying distant galaxies imaged by NASA's Hubble Space Telescope.


“Not only are people better than computers at detecting the subtleties that differentiate galaxies, they can do things computers can't do, like spot things that just look interesting,” explained Zooniverse director Chris Lintott, an astronomer at the University of Oxford.


Zooite Hanny van Arkel, a Dutch schoolteacher, discovered a strange green object floating in her cosmic soup, pictured above.


When van Arkel noticed this unusual greenish object and posted an image of it on the Galaxy Zoo forum, not even the experts knew what it was.


They named it “Voorwerp,” Dutch for “object.”


Another group of Zooites found green “peas” in theirs, and dubbed themselves the “Peas-Corp.”


The peas turned out to be small, round green galaxies about a tenth the size of the Milky Way. These are now believed to be the most efficient star factories in the universe, forming huge numbers of stars in a hurry.


“It was easy to find 'peas' by computer once we knew they were there, but without the human factor we'd never have noticed them,” said Lintott.


Lintott started Zooniverse in 2007 to solve a very large and unique problem: "I had too many galaxies on my hands," he explains.


Lintott was faced with classifying, by shape, one million galaxies imaged by the Sloan Digital Sky Survey.


First he did what any self-respecting scientist would do: “I asked a graduate student to classify them.”

 

 

 

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