Caught on tape: Death star galaxy

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http://news.yahoo.com/s/ap/20071217/ap_on_sc/death_star

Caught on tape: Death star galaxy

By SETH BORENSTEIN, AP Science Writer

1 hour, 35 minutes ago

WASHINGTON - The latest act of senseless violence caught on tape is

cosmic in scope: A black hole in a " death star galaxy " blasting a

neighboring galaxy with a deadly jet of radiation and energy.

A fleet of space and ground telescopes have captured images of this

cosmic violence, which people have never witnessed before, according

to a new study released Monday by NASA.

" It's like a bully, a black-hole bully punching the nose of a passing

galaxy, " said astrophysicist Neil deGrasse Tyson, director of the

Hayden Planetarium in New York, who wasn't involved in the research.

But ultimately, this could be a deadly punch.

The telescope images show the bully galaxy shooting a stream of

deadly radiation particles into the lower section of the other

galaxy, which is about one-tenth its size. Both are about 8.2 billion

trillion miles from here, orbiting around each other.

The larger galaxy has a multi-digit name but is called the " death

star galaxy " by one of the researchers who discovered the galactic

bullying, of the Harvard-sonian Center for

Astrophysics.

Tens of millions of stars, including those with orbiting planets, are

likely in the path of the deadly jet, said study co-author

Hardcastle of the University of Hertfordshire in the United Kingdom.

If Earth were in the way — and it's not — the high-energy particles

and radiation of the jet would in a matter of months strip away the

planet's protective ozone layer and compress the protective

magnetosphere, said . That would then allow the sun and the jet

itself to bombard the planet with high-energy particles.

And what would that do life on the planet?

" Decompose it, " Tyson said.

" Sterilize it, " piped in.

The jet attack is relatively new, in deep space time. Hardcastle

estimates it's no more than 1 million years old and can stretch on

for another 10 to 100 million years.

" A truly extraordinary act of violence, " said. " The jet

violently slams into that lower half of the neighboring galaxy after

which the jet dramatically twists and bends. "

The good news is that eventually an area of hot gas that gets hit and

compressed by this mysterious jet — astronomers are still baffled by

what's in it and how it works — over millions and billions of years

can form stars, Tyson said.

NASA, the National Radio Astronomy Observatory in United States and

the University of Manchester in the United Kingdom used ground

optical and radio telescopes, the Hubble Space Telescope, the Chandra

X-ray Observatory, and the infrared Spitzer Space Telescope to get an

image of the violence on various wavelengths, including invisible

ones. The results will be published in The Astrophysical Journal next

year.

The two galaxies are only 24,000 light-years apart and are in a slow

merging process. The jet has already traveled 1 million light-years.

A light-year is about 5.88 trillion miles.

Tyson said there are two main lessons to be learned from what the

telescopes have found:

" This is a reminder that you are not alone in the universe. You are

not isolated. You are not an island. "

And " avoid black holes when you can. "

[Guest guest]

>

> Tyson said there are two main lessons to be learned from what the

> telescopes have found:

>

> " This is a reminder that you are not alone in the universe. You are

> not isolated. You are not an island. "

>

> And " avoid black holes when you can. "

>

Thank-you Tom