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Sun's Movement Through Milky Way... Comets Hurtling...Life Extinctions
Science Daily ^ | 5-2-2008 | Cardiff University

Posted on 05/02/2008 8:53:50 AM PDT by blam

Sun's Movement Through Milky Way Regularly Sends Comets Hurtling, Coinciding With Mass Life Extinctions

A large body of scientific evidence now exists that support the hypothesis that a major asteroid or comet impact occurred in the Caribbean region at the boundary of the Cretaceous and Tertiary periods in Earth's geologic history. Such an impact is suspected to be responsible for the mass extinction of many floral and faunal species, including the large dinosaurs, that marked the end of the Cretaceous period. (Credit: Art by Don Davis / Courtesy of NASA)

ScienceDaily (May 2, 2008) — The sun's movement through the Milky Way regularly sends comets hurtling into the inner solar system -- coinciding with mass life extinctions on earth, a new study claims. The study suggests a link between comet bombardment and the movement through the galaxy.

Scientists at the Cardiff Centre for Astrobiology built a computer model of our solar system's movement and found that it "bounces" up and down through the plane of the galaxy. As we pass through the densest part of the plane, gravitational forces from the surrounding giant gas and dust clouds dislodge comets from their paths. The comets plunge into the solar system, some of them colliding with the earth.

The Cardiff team found that we pass through the galactic plane every 35 to 40 million years, increasing the chances of a comet collision tenfold. Evidence from craters on Earth also suggests we suffer more collisions approximately 36 million years. Professor William Napier, of the Cardiff Centre for Astrobiology, said: "It's a beautiful match between what we see on the ground and what is expected from the galactic record."

The periods of comet bombardment also coincide with mass extinctions, such as that of the dinosaurs 65 million years ago. Our present position in the galaxy suggests we are now very close to another such period.

While the "bounce" effect may have been bad news for dinosaurs, it may also have helped life to spread. The scientists suggest the impact may have thrown debris containing micro-organisms out into space and across the universe.

Centre director Professor Chandra Wickramasinghe said: "This is a seminal paper which places the comet-life interaction on a firm basis, and shows a mechanism by which life can be dispersed on a galactic scale."

The paper, by Professor Napier and Dr Janaki Wickramasinghe, is to be published in the Monthly Notices of the Royal Astronomical Society.

Adapted from materials provided by Cardiff University, via EurekAlert!, a service of AAAS.


TOPICS: News/Current Events
KEYWORDS: asteroidday; asteroids; catastrophism; comet; extinction; godsgravesglyphs; impact; milkyway; panspermia; soundsbadreallybad; spirograph; sun; weareindeepdoodoo
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1 posted on 05/02/2008 8:53:50 AM PDT by blam
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To: SunkenCiv

Catastrophism Ping.


2 posted on 05/02/2008 8:54:17 AM PDT by blam (Secure the border and enforce the law)
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To: blam
The scientists suggest the impact may have thrown debris containing micro-organisms out into space and across the universe.

I know I'm being picky, but there's an implication that the impact threw debris out of our solar system, out of our galaxy, and out across the universe. That's ... ah ... impressive. Snort.

3 posted on 05/02/2008 9:02:24 AM PDT by ClearCase_guy (Et si omnes ego non)
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To: blam

All this supposed whirling around is making me nauseous.


4 posted on 05/02/2008 9:04:30 AM PDT by GourmetDan (Eccl 10:2 - The heart of the wise inclines to the right, but the heart of the fool to the left.)
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To: blam

Another opinion:

Munir Humayun, an associate professor in FSU’s Department of Geological Sciences and a researcher at the National High Magnetic Field Laboratory, co-authored a paper, “Partitioning of Palladium at High Pressures and Temperatures During Core Formation,” that was recently published in the peer-reviewed science journal Nature Geoscience.

The paper provides a direct challenge to the popular “late veneer hypothesis,” a theory which suggests that all of our water, as well as several so-called “iron-loving” elements, were added to the Earth late in its formation by impacts with icy comets, meteorites and other passing objects.


This is ‘science’


5 posted on 05/02/2008 9:07:47 AM PDT by RightWhale (Repeal the Law of the Excluded Middle)
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To: blam

I’ve always suspected there are occasional mass bombardments like this, and it will be a bad day when it happens again.


6 posted on 05/02/2008 9:08:37 AM PDT by Williams
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To: GourmetDan

Think of how fast the earth itself is rotating and you’ll puke.


7 posted on 05/02/2008 9:08:39 AM PDT by Sacajaweau ("The Cracker" will be renamed "The Crapper")
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To: blam
YouTube Video Explains 'Global Warming'

Like it or not, we are all in God's hands.

8 posted on 05/02/2008 9:11:24 AM PDT by ex-Texan (Matthew 7: 1 - 6)
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To: blam

2012, man....


9 posted on 05/02/2008 9:17:31 AM PDT by Cyber Liberty (Don’t trust anyone who can’t take a joke. [Congressman BillyBob])
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To: RightWhale
I love science and I love God.

Guillermo Gonzalez & Jay W Richards, The Privileged Planet: How Our Place In The Comos is Designed For Discovery

Strong on science. God more by implication.

10 posted on 05/02/2008 9:20:08 AM PDT by onedoug
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To: onedoug

That’s nice. Science is an illusion.


11 posted on 05/02/2008 9:24:22 AM PDT by RightWhale (Repeal the Law of the Excluded Middle)
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To: blam

This needs to be passed on to Nancy Pelosi immediately so that legislation requiring human measures to stabilize the sun’s movement through the galaxy can be passed. The bulk of the human measures can be implemented by the wealthy countries because the poorer countries can’t afford to do it and the wealthy countries got their wealth by exploiting the poorer countries. We need to act now. The world can’t wait!


12 posted on 05/02/2008 9:26:42 AM PDT by 17th Miss Regt
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To: Sacajaweau
"Think of how fast the earth itself is rotating and you’ll puke."

How do you tell the difference between a rotating earth and a rotating universe?

13 posted on 05/02/2008 9:28:18 AM PDT by GourmetDan (Eccl 10:2 - The heart of the wise inclines to the right, but the heart of the fool to the left.)
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To: RightWhale

So is the way by which your sentance came to me.


14 posted on 05/02/2008 9:28:42 AM PDT by onedoug
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To: RightWhale

“That’s nice. Science is an illusion.”

Sure it is. Go find a nuclear warhead, sit on it, and set it off. Enjoy the “illusion”.

Science is the least illusory of human endeavors. It is solely concerned with understanding how the “real world” works. Much of the rest of human activity is concerned with actively avoiding or denying those same realities.


15 posted on 05/02/2008 9:42:09 AM PDT by PreciousLiberty
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To: 75thOVI; aimhigh; Alice in Wonderland; AndrewC; aristotleman; Avoiding_Sulla; BenLurkin; Berosus; ..
Thanks blam.
 
Catastrophism
· join · view topics · view or post blog · bookmark · post new topic ·

16 posted on 05/02/2008 9:44:39 AM PDT by SunkenCiv (https://secure.freerepublic.com/donate/_______________________Profile updated Monday, April 28, 2008)
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To: GourmetDan

“How do you tell the difference between a rotating earth and a rotating universe?”

I usually start with Occam’s Razor... ;-)


17 posted on 05/02/2008 9:45:21 AM PDT by PreciousLiberty
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Asteroids: Deadly Impact Asteroids:
Deadly Impact

National Geographic

18 posted on 05/02/2008 9:46:12 AM PDT by SunkenCiv (https://secure.freerepublic.com/donate/_______________________Profile updated Monday, April 28, 2008)
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To: PreciousLiberty
"I usually start with Occam’s Razor... ;-)"

And how is a rotating earth simpler?

19 posted on 05/02/2008 9:46:21 AM PDT by GourmetDan (Eccl 10:2 - The heart of the wise inclines to the right, but the heart of the fool to the left.)
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The Cycle of Cosmic Catastrophes: Flood, Fire, and Famine in the History of Civilization The Cycle of Cosmic Catastrophes:
Flood, Fire, and Famine
in the History of Civilization

by Richard Firestone,
Allen West, and
Simon Warwick-Smith


20 posted on 05/02/2008 9:47:13 AM PDT by SunkenCiv (https://secure.freerepublic.com/donate/_______________________Profile updated Monday, April 28, 2008)
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