Hubble telescope zeroes in on green blob in space
2011-01-12 0:00

By Seth Borenstein | MetroNews.ca


The Hubble Space Telescope got its first peek at a mysterious giant green blob in outer space and found that it is strangely alive.

The bizarre glowing blob is giving birth to new stars, some only a couple million years old, in remote areas of the universe where stars do not normally form.

The blob of gas was discovered first by a Dutch school teacher in 2007 and is named Hanny’s Voorwerp (HAN’-nee’s-FOR’-vehrp). Voorwerp is Dutch for object.

NASA released the new Hubble photo Monday at the American Astronomical Society meeting in Seattle, Washington.

Parts of the green blob are collapsing and the resulting pressure from that is creating the stars. The stellar nurseries are outside of a normal galaxy, which is usually where stars live.

That makes these "very lonely newborn stars" that are "in the middle of nowhere," said Bill Keel, the University of Alabama astronomer who examined the blob.

The blob is the size of the Milky Way, the galaxy that includes the Earth, and it is 650 million light years away. Each light year is about 6 trillion miles.

The blob is mostly hydrogen gas swirling from a close encounter of two galaxies; it glows because it is illuminated by a quasar in one of the galaxies. A quasar is a bright object full of energy powered by a black hole.

The blob was discovered by elementary school teacher Hanny van Arkel, who was 24 at the time, as part of a worldwide Galaxy Zoo project where everyday people can look at archived star photographs to catalogue new objects.

Van Arkel said when she first saw the odd object in 2007 it appeared blue and smaller. The Hubble photo provides a clear picture and better explanation for what is happening around the blob.

"It actually looked like a blue smudge," van Arkel told The Associated Press. "Now it looks like dancing frog in the sky because it’s green." She says she can even see what passes for arms and eyes.

Since van Arkel’s discovery, astronomers have looked for similar gas blobs and found 18 of them. But all are about half the size of Hanny’s Voorwerp, Keel said.


Article from: metronews.ca



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