Wednesday, June 1, 2016

ASTEROIDS - Scientists have details about exactly one recent asteroid strike large enough to wipe out an urban area


Asteroids Comets and Planet X

Revelation 8:11 - And the name of the star is called Wormwood: and the third part of the waters became wormwood; and many men died of the waters, because they were made bitter.

Killer Asteroid is Just a Matter of Time

Space rocks big enough to destroy a city hit the Earth much more often than thought, according to an estimate by a private group devoted to preventing disaster from such orbital killers.

It took a space rock the size of San Francisco to finish off the dinosaurs 65 million years ago, but a decent-sized metropolis could be reduced to smoldering ruins by a boulder that could fit inside a soccer field. 
The strike rate for such large space rocks, properly known as asteroids, has been estimated at once every 3,000 years, but the B612 Foundation, a planetary defense group, says the true figure could be as high as once a century. Outside scientists say that frequency is plausible but could well be too high.

"There are people who say, 'Oh, once every million years we have something we have to worry about.' That couldn't be more wrong," says physicist and former space shuttle astronaut Ed Lu, chief executive officer of the B612 Foundation. "Eventually you're going to get hit, because it's just a matter of time."

B612's once-a-century estimate comes in part from data collected by a worldwide network of sensors designed to detect nuclear explosions. The sensor network, which became a global system only within the past decade, picks up the ultra-deep sound waves that circle the Earth after a nuclear bomb is detonated in the atmosphere or just under the Earth's surface or when an asteroid explodes in midair. The data were made available to the foundation by Peter Brown of the University of Western Ontario, who will present the numbers at a scientific conference this summer.

Since 2000, the sensors have detected 26 asteroid blasts equivalent to at least 1,000 tons of TNT. In four of those incidents, the space rock's explosion unleashed more energy than the atomic bomb that leveled Hiroshima. 
The self-destruction of an asteroid roughly as big as a house in 2009 just off the Indonesian coast was more powerful than three Hiroshima bombs. An even bigger asteroid explosion over Chelyabinsk, Russia, in 2013 injured more than 1,000 people, blew out windows and created a fireball bright enough to give some witnesses a sunburn.

None of the 26 asteroids in Brown's data was big enough to destroy a city, because of their size and composition and because all exploded high in the atmosphere. But Lu says this database of harmless asteroids can be extrapolated to shed light on the frequency of their fearsome cousins. The results suggest that a city-killer strikes once a century, though Lu says he wouldn't be surprised if the true rate were actually less worrisome, perhaps once every 150 or 200 years or less frequent still.

Lu's group is raising money to build an orbiting telescope to spot potentially destructive asteroids, including those big enough to wipe out a city, decades before they strike the Earth. Numerous telescopes around the world survey the sky for asteroids, and more instruments are coming online. B612 says its orbiting craft would be far more efficient at spotting space rocks that are relatively small but deadly.

Brown agrees that the true hit rate for asteroids of that size is probably more frequent than past estimates, but he's cautious about the B612 Foundation's once-a-century number.

"It could be that high," Brown says, but once every 100 years "is probably very near the upper range of numbers." 
The true number is probably closer to once in 500 years, or even once in 1,000 years, he says. In a 2013 study, Brown and his colleagues found that impacts by asteroids ranging from bus-sized to department-store-sized could be 10 times more common than thought, but a definitive number is impossible, given the skimpy database of city-killers. 
Scientists have details about exactly one recent asteroid strike large enough to wipe out an urban area: the Tunguska event, when an asteroid perhaps 180 feet wide exploded over the wilderness of Siberia in 1908, leveling 800 square miles of forest.

"It is quite possible that Tunguska is a once-per-century event, but it is also possible that it's a once-per-three-centuries event," says Brown's co-author Mark Boslough of Sandia National Laboratories via e-mail, who notes that other experts think the hit rate is much lower. "We need more surveys … to resolve this." 
The Answer you seek is found only in what Jesus did at the Cross!http://www.exposingsatanism.org/images/smilies/yes-with-sign.gif
Are you struggling with a big decision or wondering how your eternal future will play out?
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“Heavenly Father,
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I want to receive all that Jesus Christ has provided for me as my Savior. Your Word says, ‘Whosoever shall call on the name of the Lord shall be saved’ (Romans 10:13).
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“Till The Storm Passes By”             
Mosie Lister     

lyrics

In the dark of the midnight,
Have I oft hid my face;
While the storm howls above me,
And there's no hiding place;
'Mid the crash of the thunder,
Precious Lord, hear my cry;
"Keep me safe 'til the storm passes by."

'Til the storm passes over,
'Til the thunder sounds no more;
'Til the clouds roll forever from the sky,
Hold me fast, let me stand,
In the hollow of Thy hand;
Keep me safe 'til the storm passes by.

Many times Satan whispers,
"There is no need to try;
For there's no end of sorrow,
There's no hope by and by";
But I know Thou art with me,
And tomorrow I'll rise;
Where the storms never darken the skies.

'Til the storm passes over,
'Til the thunder sounds no more;
'Til the clouds roll forever from the sky,
Hold me fast, let me stand,
In the hollow of Thy hand;
Keep me safe 'til the storm passes by.

When the long night has ended,
And the storms come no more,
Let me stand in Thy presence.
On that bright, peaceful shore.
In that land where the tempest
Never comes, Lord may I
Dwell with Thee when the storm passes by.

'Til the storm passes over,
'Til the thunder sounds no more;
'Til the clouds roll forever from the sky,
Hold me fast, let me stand,
In the hollow of Thy hand;
Keep me safe 'til the storm passes by.

Hold me fast, Let me stand,
In the hollow of Thy hand;
Keep me safe 'til the storm passes by.

'Til the storm passes by.


http://www.exposingsatanism.org/showthread.php/146-Asteroids-Comets-and-Planet-X

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