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Submission + - SPAM: Class of Large but Very Dim Galaxies Discovered

schwit1 writes: Astronomers have now detected and measured a new class of large but very dim galaxy that previously was not expected to exist.

‘Ultradiffuse’ galaxies came to attention only last year, after Pieter van Dokkum of Yale University in New Haven, Connecticut, and Roberto Abraham of the University of Toronto in Canada built an array of sensitive telephoto lenses named Dragonfly. The astronomers and their colleagues observed the Coma galaxy cluster 101 megaparsecs (330 million light years) away and detected 47 faint smudges.

“They can’t be real,” van Dokkum recalls thinking when he first saw the galaxies on his laptop computer. But their distribution in space matched that of the cluster’s other galaxies, indicating that they were true members. Since then, hundreds more of these galaxies have turned up in the Coma cluster and elsewhere.

Ultradiffuse galaxies are large like the Milky Way — which is much bigger than most — but they glow as dimly as mere dwarf galaxies. It’s as though a city as big as London emitted as little light as Kalamazoo, Michigan.

More significantly, they have now found that these dim galaxies can be as big and as massive as the biggest bright galaxies, suggesting that there are a lot more stars and mass hidden out there and unseen than anyone had previously predicted.

Comment Is this some type of flash-mob baseball game? (Score 1) 114

I was under the impression that these baseball/concert stadiums are relatively permanent structures. Why can't they just mount a few of these on the overhang above the fans/field? Seems simpler, cheaper, and easier to implement. If the cost of the communications equipment is prohibitive, they could just have a few mounts in each stadium and move the equipment around as needed.

Comment Re:Is it any easier to program than the Tianhe-2? (Score 4, Funny) 247

...Tianhe-2 is notoriously hard to program for. ... And will USA ever catch up?

The Chinese currently have beat everyone else in this, but I believe there are several U.S. government funded teams working on developing supercomputers that are increasingly difficult to program.

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