Asteroid Near-Misses (AKA: Holy Shit! We're All Going to Die)

Ermintruder

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http://neo.jpl.nasa.gov/pdc15/

A Near Earth Object Project symposium, practising what the practical steps would be in the event of The End Of The World As We Know It (including, presumably, Bruce Willis and Elijah Wood). It was an opportunity for heavy rock fans to look to the stars with with expectant eyes, but not to tempt fate or fall. This was no rain dance, more of a white-coated "what if".

"This webpage does not describe a real potential asteroid impact. The information on this page is fictional and provided only to support an emergency response exercise conducted during the International Academy of Astronautics (IAA) 2015 Planetary Defense Conference in Frascati, Italy, April 13-17, 2015. This is only an exercise."



2015 IAA Planetary Defense Conference (PDC), to be held April 13 - 17, 2015 in Frascati, Italy, a hypothetical asteroid impact scenario will be presented and used as a basis for discussion. NOTE: Although this scenario is realistic in many ways, it is completely fictional and does NOT describe a real potential asteroid impact. The scenario begins as follows:

  • The asteroid is discovered on April 13, 2015, the first day of the conference, at magnitude 20.9, declination -39 degrees and heading south. It is assigned the designation "2015 PDC" by the Minor Planet Center, and classified as a Potentially Hazardous Asteroid (PHA) based on its orbit. (To reinforce the fact that this is not a real asteroid, we are using three letters in the designation, something which would never be done for an actual asteroid.)
So rest easy, folks. If it gets spotted, you'll know it's not for real if it's got a Three Letter Acronym, like for 'ELE' in the movie.

And of course, unlike every disaster movie made since Hollywood began, the Government wouldn't keep it a secret from us, in reality. Probably.
 

kamalktk

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So rest easy, folks. If it gets spotted, you'll know it's not for real if it's got a Three Letter Acronym, like for 'ELE' in the movie.
The ability to delegate things into non-existence based on nomenclature. :p
 

Mythopoeika

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And of course, unlike every disaster movie made since Hollywood began, the Government wouldn't keep it a secret from us, in reality. Probably.
We often get told about the passing of some of these objects after they have safely gone past.
Like mushrooms, we are kept in the dark and fed on sh*t.
 

mr_nic

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Nasa says the world is not going to end in September

Space agency kills off internet rumour by confirming an asteroid strike will not wipe out humanity in the next few weeks, or years, or decades

Good news for those with plans for October and beyond: the Earth will still be in existence.

Nasa has confirmed – after rumours swept the internet about an imminent asteroid strike expected between 15 and 28 September – that the two-week period in question will be entirely free of Earth-destroying space attacks.
The likelihood of any known potentially hazardous asteroid striking the planet within the next 100 years stands at 0.01%, the space agency said in a statement.

Persistent rumours on “numerous recent blogs and web postings” that an errant asteroid is due to wipe out not just Puerto Rico, but the Atlantic and Gulf coasts of the United States and Mexico, as well as Central and South America, persuaded Nasa scientists that they needed to speak up, the statement says.
“There is no scientific basis – not one shred of evidence – that an asteroid or any other celestial object will impact Earth on those dates,” said Paul Chodas, manager of Nasa’s near-Earth object office at the jet propulsion laboratory in Pasadena, California.

“If there were any object large enough to do that type of destruction in September, we would have seen something of it by now.”

It is not the first time Nasa has punctured the excitement of doom-mongers. In 2012, it dismissed claims that the comet Elenin was on its way to destroy mankind, calling it a “trail of piffling particles”.

The space agency was also proved right in its assertion that the world would not end on 21 December 2012, as the Mayan calendar came to an end, heralding the apocalypse.

“There is no existing evidence that an asteroid or any other celestial object is on a trajectory that will impact Earth,” Chodas said. “In fact, not a single one of the known objects has any credible chance of hitting our planet over the next century.”

The jet propulsion lab’s asteroid watch website helpfully lists the next five close approaches by asteroids to the Earth. Of these, the riskiest will pass within 1,689,811 km (1,050,000 miles) of our planet on 21 August. Which is today. So be careful out there.


http://www.theguardian.com/science/2015/aug/21/nasa-says-the-world-is-not-going-to-end-in-september
 
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“This is an animated depiction of the novel SHEPHERD spacecraft concept on a mission to gently stop a small asteroid from spinning and guide it into a different orbit by enclosing the target asteroid in a sealed fabric enclosure. Once captured, SHEPHERD introduces a one tenth atmosphere of Xenon gas to de-spin the asteroid and then blows Xenon gas at the asteroid to gently impart momentum (and an orbital change) to the object while matching the relative position of the spacecraft with thrust from it’s solar electric propulsion engine. In this way SHEPHERD can securely handle and drive even a fragile, pristine and ancient asteroid to its destination. This mission is to release the asteroid in Lunar orbit for a human crew to approach and collect samples for science ...

http://hplusmagazine.com/2015/08/21/video-friday-shepard-novel-system-for-safe-asteroid-capture/
 

rynner2

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* Does not compute! *

Once captured, SHEPHERD introduces a one tenth atmosphere of Xenon gas to de-spin the asteroid

Conservation of angular momentum implies that if the asteroid stops spinning, something else (presumably SHEPHERD itself) will end up spinning. And what's the use of that?

(The mechanism for the transfer of angular momentum would presumably be eddies formed in the one tenth atmosphere, which would then spin up the fabric enclosure. And if thrusters are used to kill that spin, they would need fuel, as I doubt that an electric propulsion engine would be powerful enough. And if the thrusters are on the spacecraft end, there would be a danger of twsting up the fabric enclosure - it would be a bit like wringing out a wet dishcloth!)

Just my two pence worth! :p
 
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* Does not compute! *

Once captured, SHEPHERD introduces a one tenth atmosphere of Xenon gas to de-spin the asteroid

Conservation of angular momentum implies that if the asteroid stops spinning, something else (presumably SHEPHERD itself) will end up spinning. And what's the use of that?

(The mechanism for the transfer of angular momentum would presumably be eddies formed in the one tenth atmosphere, which would then spin up the fabric enclosure. And if thrusters are used to kill that spin, they would need fuel, as I doubt that an electric propulsion engine would be powerful enough. And if the thrusters are on the spacecraft end, there would be a danger of twsting up the fabric enclosure - it would be a bit like wringing out a wet dishcloth!)

Just my two pence worth! :p
Why not post that at H+ or the youtube vid?
 

rynner2

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Why not post that at H+ or the youtube vid?
I can't be bothered registering and logging into new sites at the moment. With my new confusing Win10 computer, and more confusion from from my AV prog (one message today tells me my protection runs out in 7 days, but yesterday Avast agreed with me that my license is valid till next April!!).

But you can post it, with my permission, if you're already registered there.
 

skinny

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“This is an animated depiction of the novel SHEPHERD spacecraft concept on a mission to gently stop a small asteroid from spinning and guide it into a different orbit by enclosing the target asteroid in a sealed fabric enclosure. Once captured, SHEPHERD introduces a one tenth atmosphere of Xenon gas to de-spin the asteroid and then blows Xenon gas at the asteroid to gently impart momentum (and an orbital change) to the object while matching the relative position of the spacecraft with thrust from it’s solar electric propulsion engine. In this way SHEPHERD can securely handle and drive even a fragile, pristine and ancient asteroid to its destination. This mission is to release the asteroid in Lunar orbit for a human crew to approach and collect samples for science ...

http://hplusmagazine.com/2015/08/21/video-friday-shepard-novel-system-for-safe-asteroid-capture/
Finally someone found a use for Father's old Y-fronts.
 

Vardoger

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Vardoger

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Here's another interesting prediction about September 28th 2015.
The video is supposedly from 1987 and he got some very interesting predictions about the future. I'll check if there are any debunkings of this video.

 

Mythopoeika

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A 'violent conflict with aliens when they take over our computers'?
I can just imagine my laptop sprouting limbs and attacking me...wait, no I can't. :rolleyes:
Most of his other predictions were spot on, though.

Mind you, aliens could take over our military computers and do us harm that way. Launching nuclear missiles, messing about with the energy grid and causing hospital equipment to malfunction, disrupting comms technology...
Human hackers can do all that stuff anyway.
Why would aliens do that, when they could kill us all in so many subtle ways.
 
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A 'violent conflict with aliens when they take over our computers'?
I can just imagine my laptop sprouting limbs and attacking me...wait, no I can't. :rolleyes:
Most of his other predictions were spot on, though.

Mind you, aliens could take over our military computers and do us harm that way. Launching nuclear missiles, messing about with the energy grid and causing hospital equipment to malfunction, disrupting comms technology...
Human hackers can do all that stuff anyway.
Why would aliens do that, when they could kill us all in so many subtle ways.
Why would aliens do that, when they could kill us all in so many subtle ways.

Because Aliens never do things the easy way in films or on TVs. They act like Bond villains.
 

Moooksta

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They act like Bond villains.
If that's true then I'll expect to be sat down on the 27th by an alien and have the entire intricate plan for take over and destruction explained to me fully while I burn through the rope using this 'ere laser hidden in my iPhone.
 

Vardoger

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Here's another interesting prediction about September 28th 2015.
The video is supposedly from 1987 and he got some very interesting predictions about the future. I'll check if there are any debunkings of this video.

There are too many debunkings to list, but a few of them claim he's a conman because of other videos he has made, the glasses are too modern for the 80s and so on.
 

GNC

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These things can be easily faked. There was a psychic who predicted the assassination attempt on Ronald Reagan and recorded it on date stamped video - after the attempt had happened.
 

Naughty_Felid

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There are too many debunkings to list, but a few of them claim he's a conman because of other videos he has made, the glasses are too modern for the 80s and so on.


You think that he'd some something more than walking up and down a garden to give his video a little more credibility if it was true. Walking down a street and talking with 80's cars and people wearing 80's clothing going on around him.

Also that lamp didn't come out until 2004.
 

rynner2

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Graham Hancock covers a lot of ground in his books, but I think this story can go here:

Have the secrets of a lost civilisation finally been unearthed?
Rupert Hawksley 4 October 2015 • 8:00am

...
Twenty years ago, Hancock set the cat among the academic pigeons when he published a book called Fingerprints of the Gods, a re-evaluation of mankind's past that claimed an advanced civilisation was wiped out by a giant comet towards the end of the last Ice Age.

Based on Hancock's own investigations and interviews with archaeologists and astronomers, the book claimed survivors of this cataclysm, the giant flood remembered in myths all around the world, went on to settle in locations from Mexico to Egypt and impart their ancient knowledge to the other remaining humans.

...

Now, he has written a sequel to Fingerprints, Magicians of the Gods, which reveals "explosive new evidence" to support his claims. It also warns of another comet strike that is destined to hit Earth in 2030.
The book, which is already a bestseller, has proved irresistible to fans and Hancock's talks, which he has been holding to accompany the launch, have been hugely popular, attracting far larger audiences than equivalent talks by Booker-prize winning authors.

What Hancock has not achieved, however, is credibility. Leading archaeologists have been denouncing his theories for decades. He has been compared to The Da Vinci Code author Dan Brown and dismissed as a pseudo archaeologist or "Pyramidiot".
Hancock has no formal qualifications in archaeology, history or astronomy. His long-standing interest in hallucinogenic drugs – "they are something that society really needs" – has not enhanced his reputation either.

But the author says he has never claimed to be an academic. He presents himself as a journalist who is simply reporting theories by scientists who think they can fill in some of the gaps in the history of mankind – holes acknowledged by all mainstream academics.
"Let's get to grips with that first of all," he says. "The foundations upon which history is based look increasingly suspect. Let's no longer shroud ourselves in the illusion that [traditional] historians and archaeologists are invincible."
There are, according to Hancock, two smoking guns. Firstly, matter was discovered recently in North America that is likely to have been caused by a comet or asteroid strike. In 2014, the Journal of Geology confirmed that this matter was formed 12,800 years ago.

"For someone who proposed [in Fingerprints of the Gods] a giant cataclysm between 12,000 and 13,000 years ago, it is a bit of a gift from the universe to have a bunch of very major scientists now saying that there was indeed a giant comet impact 12,800 years ago," he says. :D

Secondly, excavations at an archaeological site in Turkey called Göbekli Tepe have uncovered ruins that are at least 11,600 years old. That is more than 6,000 years older than other megalithic sites such as Stonehenge. A civilisation capable of the advanced architecture and art discovered at Göbekli Tepe is not supposed to have existed 11,600 years ago.

So what is the explanation?
"We're looking at a place where the survivors of a lost civilisation settled." References to these survivors – described as sages, magicians or "mystery teachers of Heaven" – can be found in various cultures, he adds.
"When the evidence started to build up, my first feeling was one of weariness," he says. "Because my books have been quite successful, I have been subjected to more of the scathing and withering attacks on the quality of my work, and on my qualities as a human being, by the academic community than anybody else. But this story needs to be told. It would just be plain wrong for me to ignore it."

...

And Hancock believes that we may be about to lose another part of the human story. In the conclusion to his new book, he writes: "It is possible – indeed highly probable – that we are not yet done with the comet that changed the face of the earth between 12,800 years ago and 11,600 years ago."
There remains, he explains, at least one large comet in the same meteor stream. In 2030, we are due to come into contact with it once again.

"We have fallen out of harmony with the universe… In mythological terms, we tick all the boxes for the next lost civilisation," warns Hancock. "Plato says it very clearly about the citizens of Atlantis: there was a time when they loved a pure and good life but they became arrogant and cruel and no longer bore their prosperity with moderation. I think we sound a lot like that."
...

http://www.telegraph.co.uk/books/authors/graham-hancock-interview/

Ancient history, Atlantis, Göbekli Tepe, comet/asteroid impacts - several major Fortean themes linked together. Perhaps this book should have its own thread? If not, here will do. I probably won't be around in 2030 to see the next big impact...
 
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Zeke Newbold

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Yes, this does need it's own thread.

I must confess to not having read a whole book by Hancock - and that's largely because I had previously read similar authors before, peddling the same kind of cyclic civilisations line, such as Richard Mooney,David Thompson and the like.

The problem here is that, if you are going to posit the notion of there being a technologically advanced society previous to our own - and I believe that is what Hancock is doing - then they ought to have left a darn sight more `fingerprints` behind them than they have. (I believe Hancock tries to get round this by claiming that all the left over technology is hidden under the Antarctic ice, owing to a polar shift...which seems like a bit of a sleight of hand).

In this sense the Ancient Astronaut (AKA paleo-seti)position, as popularised by Daniken has the edge when it comes to accounting for anachronisms:the perpetrators buggered off to whence they came.

I also believe that, in one of his books, which involved Mars, Hancock gave credence to the `Face on Mars`: this to me is like a litmus test of credibility. if you believe there's a `face` on Mars, you're disqualified.

He just comes across to me as a bright-eyed unreconstructed hippy - as was further demonstrated when he started banging on about psychedelic hallucinogens.

Sorry to be negative: the guy's probably on to something somewhere in all of that, but I'm not worried about 2030 anymore than I was the blood Moon, which we all had the temerity to survive.
 
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