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Serious asteroid strike that could wipe out humanity is 'just a matter of time',- Expert

mentor_LEE

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http://www.dailymail.co.uk/sciencet...physicist-warns-asteroid-impact-imminent.html



A surprise asteroid strike that could wipe out humanity is 'just a matter of time', warns leading astrophysicist


Over 1,800 potentially hazardous objects in spacehave been discovered so far
Top astrophysicist Alan Fitzsimmons said there are more asteroids to be found
In January an asteroid passed by Earth at a distance half that of the moon
We are much better at finding larger asteroids but 'that does us no good if we are not prepared to do something about them', the expert warned

By Phoebe Weston For Mailonline

Published: 16:00 BST, 20 June 2017 | Updated: 16:00 BST, 20 June 2017

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A leading astrophysicist has warned the next asteroid strike is just a matter of time as thousands of potentially threatening objects circle Earth.

Dr Alan Fitzsimmons has said it is a case of when an asteroid collision will happen, rather than if it will happen, with more asteroids being discovered every day.

An unexpected strike in today's world could easily destroy a major city and a larger one could potentially wipe out humanity, the expert warned.

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If the flying rock, which is 230 metres (755 feet) in diameter, were to strike Earth experts believe it would have an impact 300 times greater than Hiroshima bomb (stock image)

A leading astrophysicist has warned the next asteroid strike is just a matter of time as potentially thousands of threatening objects are circling in space
TUNGUSKA MYSTERY

Dr Alan Fitzsimmons is highlighting the threat for Asteroid Day, a global event next Friday.

On that day in 1908, a massive explosion ripped through the sky over the Tunguska region of Siberia, flattening trees nearly 31 miles around.

The blast is thought to have been produced by a comet or asteroid hurtling through Earth's atmosphere at over 33,500 miles per hour, resulting in an explosion equal to 185 Hiroshima bombs as pressure and heat rapidly increased.

Eighty million trees had been laid flat in the blast, and the charred carcasses of reindeer were found by the hundreds.

The object likely entered the atmosphere at 9-19 miles per second, and would have been extremely fragile, destroying itself roughly six miles above Earth.

But, with no impact crater and little evidence of such an object ever found, scientists remain perplexed as to what truly caused the event in which 'the sky was split in two'.

The possibility of an asteroid explosion was first proposed in 1927 by Leonid Kulik, 20 years after the event.

Others suggested the space-object may instead have been a comet, made up of ice rather than rock, meaning it would have evaporated as it entered Earth's atmosphere.

'It is important to know that scientists and engineers have made great strides in detecting Near-Earth Asteroids and understanding the threat posed by them', said Dr Fitzsimmons from Queen’s University Belfast Astrophysics Research Centre.

'Over 1,800 potentially hazardous objects have been discovered so far, but there are many more waiting to be found.

'Astronomers find Near-Earth Asteroids every day and most are harmless.'

'But it is still possible the next Tunguska would take us by surprise, and although we are much better at finding larger asteroids, that does us no good if we are not prepared to do something about them', he said.

Joined by scientist Brian Cox and astronauts such as Apollo 9 astronaut Rusty Schweickart and International Space Station astronaut Nicole Stott, Dr Fitzsimmons is highlighting the threat for Asteroid Day, a global event next Friday.

On that day in 1908, a small asteroid exploded over Tunguska in Siberia and devastated 800 square miles.

The blast is thought to have been produced by a comet or asteroid hurtling through Earth's atmosphere at over 33,500mph, resulting in an explosion equal to 185 Hiroshima bombs as pressure and heat rapidly increased.

The object likely entered the atmosphere at 9-19 miles per second, and would have been extremely fragile, destroying itself roughly six miles above Earth.

In January 2017, an asteroid as big as a 10-story building passed by Earth at a distance half that of the Moon.

4192B05B00000578-4621254-This_one_mile_wide_Metero_Crater_in_Arizona_was_caused_by_a_smal-a-59_1497963481847.jpg


This one-mile-wide Metero Crater in Arizona was caused by a small 50-metre asteroid impacting 49,000 years ago. An unexpected strike in today's world could easily destroy a major city, Dr Alan Fitzsimmons said

And experts have previously warned that humans are not prepared for an asteroid impact and, should one head for Earth, there's not much we can do about it.

Asteroids are hunks of rocky space debris, left over from the creation of the planets, which whizz around our solar system, orbiting the sun.

From time to time they cross paths with us and, while impacts on the scale of the infamous 6.2-mile (10km) 'dinosaur-destroyer' are rare, an asteroid a fifth the size could spell disaster for civilisation.
Dr Fitzsimmons (pictured) from Queen’s University Belfast Astrophysics Research Centre said it is a case of when an asteroid collision will happen, rather than if it will happen

Dr Fitzsimmons (pictured) from Queen’s University Belfast Astrophysics Research Centre said it is a case of when an asteroid collision will happen, rather than if it will happen

With energy greater than 10 million Hiroshima bombs, the impact shock would flatten everything within a 186-mile (300km) radius.

Dust and debris would cause an 'impact winter' and most living things would perish.

Alternatively, an ocean strike would trigger monumental tsunamis, obliterate entire coastlines and inject seawater into the atmosphere, destroying huge swathes of the ozone layer and exposing survivors to devastating levels of UV radiation.

Dr Joseph Nuth, is a researcher at Nasa's Goddard Space Flight Centre in Maryland, and proposed the idea.

Speaking in December 2016, he said: 'The biggest problem, basically, is there's not a hell of a lot we can do about it at the moment.'

'They are the extinction-level events, things like dinosaur killers, they're 50 to 60 million years apart, essentially.'

'You could say, of course, we're due, but it's a random course at that point.'
 

mentor_LEE

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asteroid.jpg




http://bgr.com/2017/06/21/asteroid-news-near-earth-impact/




An asteroid is definitely going to hit the Earth, expert warns
Mike Wehner @MikeWehner
June 21st, 2017 at 7:47 PM
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Space is a dangerous place to be, and since the Earth is in space, every living thing on the planet is at risk of eventually feeling its wrath. Asteroids are the most clear and present threat that our Solar System poses to us, and you only need to look at the scars on the Earth, our moon, and other planets in our neighborhood to see exactly how real that danger is. Now, a Queen’s University Belfast researcher is warning that the Earth is definitely going to be hit, it’s just a matter of when.

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The expert, Alan Fitzsimmons, points out that an event similar to that of the 1908 meteoroid explosion over the Tunguska region in Russia’s Siberia — which leveled a forest and damaged buildings but didn’t result in any human deaths — could happen again, and if it did happen over a major city, the results would be devastating.

“Astronomers find near-Earth asteroids every day and most are harmless,” Fitzsimmons reportedly said. “But it is still possible the next Tunguska would take us by surprise, and although we are much better at finding larger asteroids, that does us no good if we are not prepared to do something about them.”

It’s a fitting warning as we approach June 30th, which is observed as Astroid Day. On June 30th, researchers and former astronauts will host a live stream to answer questions from the general public which are sourced from social media. You can bet there will be plenty of talk about the potential for collisions with near-Earth objects, so if such a thing interests you, it’s a great time to get the facts straight from the experts.
Tags: asteroids, NASA, Space
 

mentor_LEE

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https://www.researchgate.net/public...extinction_of_LiangChu_Culture_4500_years_ago


New evidence for an impact origin of Taihu lake, China: Possible trigger of the extinction of LiangChu Culture 4500 years ago

Article · December 2008 with 508 Reads

Zhidong Xie
1st Zhidong Xie
20.23 · Nanjing University
H. Wang
2nd H. Wang
Thomas G. Sharp
3rd Thomas G. Sharp
36.66 · Arizona State University
P. Decarli
4th P. Decarli

Abstract
Here we report new evidence of an impact crater in south-east of China, Taihu Lake in Jiangsu Province. An impact origin was originally proposed on the basis of fractured quartz, wavy extinction quartz, and shatter cones in the sandstone of Devonian Wutong formation in the islands of Taihu lake (Wang, et al., 1992, 1993, 2000). In the absence of additional evidence, the impact origin hypothesis has fallen into disfavour. Here we report studies of sedimentary samples, which could be ejecta from Taihu, found in a small lake in the vicinity of Taihu lake. The samples consist of irregularly-shaped quartz-rich concretions found in lake sediments. Preliminary studies indicate that these samples contain angular fragments of shocked quartz. The stratigraphic age of the lake sediments is similar to that of the 65 km diameter Taihu lake. If the impact origin of Taihu lake can be conclusively established, it is of the correct age to explain the mysterious disappearance of the LiangChu culture about 4500 years ago.



To view the Chinese Great Lake TaiHu click here:


https://goo.gl/maps/LSbpkX1Jea72
 

eatshitndie

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tell me about it. at age 6.9 i dreamt of an asteroid 6.9 miles across its width striking earth in between batam and johor. and sinkies continue to bicker about lee and ho vs lee and lee as though it's the most important feature release on imax.
 

tanwahtiu

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We cannot born at the same year same month same daumy. But we can die at the same year same month same day.

Join MH37 lor ....

Bu neng tong nian tong yue tong ru sheng .... u can finish the rest.
 

mako65

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Tats very true! Human race isnt going to be annihilated by nuclear bombs but by some bigger n more powerful elements from Mother Nature! Any formulae tat calculates da end of our days?
 

Ang4MohTrump

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When USA got struck by these, Ang Moh Trump will finger point either Kim Jong Nuke or Putin or Xijinping, confusing that with nuke strike. And then will fire nukes at Pyongyang Moscow & Beijing all at once!



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