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Unseen comet's orbit indicates possible crash (path .. could be "potentially hazardous")
SFGate.com ^ | 7/28/11 | David Perlman

Posted on 07/28/2011 8:47:39 AM PDT by NormsRevenge

A stream of dusty fragments from a comet born in the outermost reaches of the solar system has hit the Earth on a path that leads astronomers to conclude the comet itself could be "potentially hazardous" if it crashes into the planet.

The comet's location is unknown, making it difficult to say when it will approach Earth, but "the orbits of the dust trail tells us that the comet is on a path that could eventually hit us," said Peter Jenniskens, an astronomer at the SETI Institute and the NASA Ames Research Center in Mountain View.

"It's very unlikely," he conceded Wednesday. "Such impacts are extremely rare in Earth's history."

The trail of dust grains, known as meteoroids, were shed by the comet long ago as it passed the sun and Earth on a long orbit that could have taken thousands of years to complete, Jenniskens said.

The comet was born billions of years ago and trillions of miles away in the cold comet nursery called the Oort Cloud, and streams of the comet's dusty progeny have returned to Earth once or twice every 60 years or so when their orbits come under the influence of Saturn and Jupiter, Jenniskens said.

(Excerpt) Read more at sfgate.com ...


TOPICS: Culture/Society
KEYWORDS: catastrophism; comet; oort; orbit; unseen
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To: NormsRevenge

So the budget stuff doesn’t matter after all.


21 posted on 07/28/2011 9:25:09 AM PDT by HereInTheHeartland (I love how the FR spellchecker doesn't recognize the word "Obama")
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To: NormsRevenge
I'm surprised the article doesn't claim that the comet is predicted to impact the earth on December 21st, 2012...

Personally, I think this comet was pushed towards earth from Klendathu in the Arachnid Quarantine Zone... stinkin' bugs!

22 posted on 07/28/2011 9:34:14 AM PDT by Sicon ("All animals are equal, but some animals are more equal than others." - G. Orwell)
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To: maddog55
Middle of the Barents Sea?

I think here would be better

35.73844,51.388169

23 posted on 07/28/2011 9:40:01 AM PDT by ASA Vet (Natural-born citizens, are those born in the country, of parents who are citizens. De Vattel)
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To: AFreeBird

Exactly. Such a good movie for pure mindless fun and entertainment.


24 posted on 07/28/2011 9:41:21 AM PDT by Hoffer Rand (There ARE two Americas: "God's children" and the tax payers)
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To: NormsRevenge

A quick, reasonably merciful death? We won’t be that lucky...


25 posted on 07/28/2011 9:42:32 AM PDT by who knows what evil? (G-d saved more animals than people on the ark...www.siameserescue.org.)
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To: NormsRevenge
The wife and I have been noticing an increased amount of shooting stars per hour, about three times normal lately, in our nightly sky viewing from the hot tub. Maybe as much as ten an hour, and I witnessed two at the same time a few nights ago which is really unusual. I have to wonder if this comet tail story isn't the reason why.

I don't know if it's a precursor of things to come, but I've always hoped that I'd get to see in my lifetime a meteor shower like the 1966 Leonids which filled the skies with hundreds of shooting stars at a time going on for hours.

26 posted on 07/28/2011 9:44:26 AM PDT by The KG9 Kid
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To: NormsRevenge

REPENT.. the END is near. /s


27 posted on 07/28/2011 10:12:57 AM PDT by VideoDoctor
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To: NormsRevenge

I blame Michelle Bachmann.

Would have been Bush’s fault but time to move on.


28 posted on 07/28/2011 10:14:56 AM PDT by dangerdoc (see post #6)
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To: The KG9 Kid

“I’ve always hoped that I’d get to see in my lifetime a meteor shower like the 1966 Leonids which filled the skies with hundreds of shooting stars at a time going on for hours.”

The Perseids come in about two weeks, but I don’t know how much the full moon will impair your seeing them.
http://stardate.org/nightsky/meteors


29 posted on 07/28/2011 11:35:15 AM PDT by DrC
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To: NormsRevenge

30 posted on 07/28/2011 11:37:36 AM PDT by McGruff (I'm with the Tea Party, not the Republican Party)
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To: NormsRevenge

After receiving news of the comet, President Obama appointed a Comet Czar to study the impact of such an impact, and to propose a tax plan to better prepare our minorities and children.


31 posted on 07/28/2011 11:42:28 AM PDT by Cementjungle
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To: NormsRevenge

My latest research indicates the comet will strike somewhere on the continental United States. All liberals must be immediately evacuated to Somalia to save the species.


32 posted on 07/28/2011 12:16:01 PM PDT by FourPeas ("Maladjusted and wigging out is no way to go through life, son." -hg)
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To: McGruff

You wanna see crashes?
Hang in there, wtf guy ;-!

The boys are racing at Indy Sunday
http://www.indianapolismotorspeedway.com/brickyard400/


33 posted on 07/28/2011 12:43:29 PM PDT by NormsRevenge (Semper Fi ... Godspeed .. Monthly Donor Onboard .. Obama: Epic Fail or Bust!!!)
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To: ASA Vet

Drop the E and N and use:

38.889914, -77.009098


34 posted on 07/28/2011 12:52:03 PM PDT by maddog55 (OBAMA: Why stupid people shouldn't vote.)
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To: DrC
I live far enough outside of Reno that my skies are appreciably dark during a new moon, but it's still regarded as a class 2 sky because I'm in the 'purple' fringe area in the Dark Sky Finder. I typically don't have to go drive anywhere for stargazing. I use the ClearDarkSky calendar chart listed here as well.

ClearDarkSky

Dark Sky Finder

Nevada and Eastern Oregon are pretty much the only large swaths of the USA left (outside of central Montana, some of Nebraska, Southern Utah, and the Dakotas) where the new moon skies are black as ink, according to the 'dark' spots as shown on the Dark Sky Finder' site. I've been way way out in the great open empty parts of my state when there's no moonlight at all and it's like being locked in a closet to the point where it seems that you can't see your own hand in front of your face. There's 'dark' and then there's 'Nevada dark'.

That's the way to see the Milky Way in the summertime. I have Nikon 10-20x50mm binocs with a steadying foot rope attached for stargazing from a folding chair.

35 posted on 07/28/2011 1:44:56 PM PDT by The KG9 Kid
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To: DCBryan1

Random thought. The Russians are still using the technology of that book, the US developed and abandoned a whole new generation since then. Who was smarter?


36 posted on 07/28/2011 1:53:19 PM PDT by Oztrich Boy (New gets old. Steampunk is always cool)
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To: The KG9 Kid

That’s a very cool tool. I grew up in NJ, so compared to where I grew up, the skies I see in NC are very dark, but obviously WAY less dark than the skies you enjoy in NV.It does amaze me that parts of western NC, which SEEM pretty remote, still apparently have lots of light pollution. I had no idea.


37 posted on 07/28/2011 4:06:07 PM PDT by DrC
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To: 75thOVI; agrace; aimhigh; Alice in Wonderland; AndrewC; aragorn; aristotleman; Avoiding_Sulla; ...
Note: this topic is from 7/28/2011. Thanks NormsRevenge.



38 posted on 08/23/2013 5:23:04 PM PDT by SunkenCiv (It's no coincidence that some "conservatives" echo the hard left.)
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To: SunkenCiv

It isn’t in sight and “[it] may have last zipped by the sun just a few hundred years ago, or many thousands...”

So I read that to mean it is hundreds or thousands years away form coming back.


39 posted on 08/23/2013 5:32:14 PM PDT by BenLurkin (This is not a statement of fact. It is either opinion or satire; or both.)
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To: The KG9 Kid

“I’ve been way way out in the great open empty parts of my state when there’s no moonlight at all and it’s like being locked in a closet to the point where it seems that you can’t see your own hand in front of your face. “

A friend of mine drove through the Dakotas last week over night and described it exactly as you did.


40 posted on 08/23/2013 5:36:12 PM PDT by Rebelbase (Tagline: (optional, printed after your name on post))
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