Technology Do We Have To Worry About An Asteroid Strike?

10:46  27 june  2017
10:46  27 june  2017 Source:   International Business Times

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  Mining the Heavens: Astronomers Could Spot Asteroid Prospects <p>Smithsonian astrophysicist Martin Elvis would like to see astronomers take on a crucial role for future asteroid mining: as astronomical prospectors scoping out the next big catch.</p>Elvis, a researcher with the Harvard-Smithsonian Center for Astrophysics in Massachusetts, discussed his dream for applied astronomy June 4 here at the Dawn of Private Space Science Symposium. Efficient asteroid mining would jump-start a space economy and bring down costs for exploration and space science, guiding humans into a modern space age, he said.

Do We Have To Worry About An Asteroid Strike ? Just because an asteroid passes by Earth from a safe distance one year doesn’t mean it will always happen that way.

Just because an asteroid passes by Earth from a safe distance one year doesn’t mean it will always happen that way.

The asteroid Apophis was discovered in 2004 and will pass very close to Earth in a few years.© Provided by IBT US The asteroid Apophis was discovered in 2004 and will pass very close to Earth in a few years. The asteroid Apophis seems like a friendly rock speeding through the space near Earth for now, but later on in its relationship with our planet, it might strike down to the surface with devastating results.

It may never happen, but it’s not out of the realm of possibility, according to a report on Astrowatch.net. After all, scientists were briefly worried in 2004 about that asteroid striking Earth, before further calculations showed there was nothing to be alarmed about. It has passed through our space neighborhood since then without incident, but Apophis has future flybys scheduled and while the next couple are going to go pretty smoothly, others may not be as pleasant.

The statistical likelihood that asteroids will destroy us all in 10 million years

  The statistical likelihood that asteroids will destroy us all in 10 million years Scientists have spent decades debating whether asteroids and comets hit the Earth at regular intervals. At the same time, a few studies have found evidence that the large extinction events on Earth – such as the one that wiped out the dinosaurs 66 million years ago – repeat themselves every 26 million to 30 million years. Given that there’s good evidence that an asteroid triggered the dinosaur extinction, it makes sense to ask whether showers of asteroids could be to blame for regular extinction events.

If large asteroid strikes happened every few decades, we ’d have something legitimate to prepare for and worry about . How often do we get an asteroid larger than about 10 meters hitting the Earth? About once every thousand years. And we are “fortunate,” depending on your definition of fortunate

An entire continent could be obliterated by an asteroid that appears to be on an impact course to strike Earth in 2019. Governments can't do much about an asteroid that might hit the earth. I would only be worried if there was total complacency on this. History shows that we have been hit many times

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NASA projects that Apophis will come by in 2029 and will return again in 2036. In the former journey, the closest the asteroid may get to Earth a little less than 20,000 miles, which is closer than some of our satellites. That’s a pretty close pass to the planet, and will put it into the record books as the closest one of its size. It will appear “to the naked eye as a moderately bright point of light moving rapidly across the sky” over the mid-Atlantic area.

The latter flyby, in 2036, will be from much farther out, several million miles away. NASA scientists finalized calculations a few years ago that showed there was no danger during that pass.

“The impact odds as they stand now are less than one in a million, which makes us comfortable saying we can effectively rule out an Earth impact in 2036,” Don Yeomans, manager of NASA’s Near-Earth Object Program Office at the Jet Propulsion Laboratory, said at the time. “Our interest in asteroid Apophis will essentially be for its scientific interest for the foreseeable future.”

The statistical likelihood that asteroids will destroy us all in 10 million years

  The statistical likelihood that asteroids will destroy us all in 10 million years Scientists have spent decades debating whether asteroids and comets hit the Earth at regular intervals. At the same time, a few studies have found evidence that the large extinction events on Earth – such as the one that wiped out the dinosaurs 66 million years ago – repeat themselves every 26 million to 30 million years. Given that there’s good evidence that an asteroid triggered the dinosaur extinction, it makes sense to ask whether showers of asteroids could be to blame for regular extinction events.

As if you don't have enough to worry about , consider the subject of a hearing last week on Capitol Hill: asteroids that may be headed toward Earth. There is a strong possibility that our benefactors will not let a major city be struck by an asteroid , at least not grow up, as a race we have a lot more to do

So, doing what Movoto is apt to do , we locked ourselves away to figure it out. What you should take from all this is the chance of being struck by an asteroid , or meteorite, is so small that you don’t have to worry about it.

But the future beyond that is wide open.

“We can rule out a collision at the next closest approach with the Earth, but then the orbit will change in a way that is not fully predictable just now, so we cannot predict the behavior on a longer timescale,” Alberto Cellino, of the Observatory of Turin in Italy, told Astrowatch.net.

Apophis is between 700 and 1,100 feet long, more than large enough to do substantial damage if it were to crash down onto the Earth. But even without Apophis, our planet is still vulnerable to a deadly asteroid. They pass by Earth all the time, sometimes more than one in a day. Usually they are relatively small and far out, but there are exceptions. For example, NASA is predicting an asteroid between 800 and 1,800 feet across flying by on June 27, from a distance that is equivalent to about a tenth of the distance between the Earth and the sun. On July 23, an asteroid between 130 and 300 feet long will pass by at about three lunar distances — in other words, three times the distance between Earth and the moon. NASA’s publicly accessible and searchable database of near-Earth objects’ close approaches is a treasure trove for doomsayers.

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Scare stories have swept the internet about an apparently fictitious killer asteroid about to strike Puerto Rico any day, so there has never been so much interest in space rocks colliding with Earth. NASA assures us not to worry about wild conspiracy theories

I agree that we 're certainly overdue for another asteroid strike , though it may not happen for decades or centuries. I also agree with Immartin that it doesn't do much good to worry about such dire possibilities, when we have no control over it.

And objects do land on Earth from time to time, even though they are small. Just earlier this year, a meteorite the size of a fist and weighing about a pound crashed down to the surface, punching a hole through a shed roof in the Netherlands right before it hit the ground. If anyone had been standing in its path, that person would have been killed.

A geologist at Holland’s Naturalis Biodiversity Center hypothesized that the rock that formed the meteorite shook loose from the asteroid belt between Mars and Jupiter.

Still, experts are not sweating it.

“There are no known asteroids on a certain collision course,” former JPL researcher Alan Harris told Astrowatch.net. “Because of imperfectly known orbits, there are some that have a low probability of impact in the distant future, but at present none of the known asteroids has a probability of impact that exceeds the random chance of an undiscovered asteroid of the same size hitting the Earth sometime between now and the possible impact date of the imperfectly known object.”

NASA to shoot asteroid into new flight path .
<p>The spacecraft, which is the size of a refrigerator, will strike an asteroid at nine times the speed of a bullet.</p>The spacecraft for the Double Asteroid Redirection Test (DART) is now moving to the design phase, and aims to demonstrate the "kinetic impactor technique" in which it will strike an asteroid and physically knock it into a different flight path.

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