What do the hunters for asteroids?
Source:Sometimes people ask Carrie Nugent on the chances that the movie "Armageddon" in 1998 happens in real life, when scientists find that an asteroid the size of Texas is 18 days from hitting the surface of the Earth with all the consequences. 33-year-old planetary scientist from the California Institute of technology says that we are unlikely to face such a big. To avoid a collision, she tries to find as many asteroids.
"the asteroid impact is the only natural disaster to prevent that, we have the technology, and this is crazy, but amazing," she adds.
Most of the asteroids in our Solar system — from 1.1 to 1.9 million of them are estimated at least 0.6 kilometers in diameter — orbits the Sun in the asteroid belt between Mars and Jupiter. The largest known asteroid is Vesta, about 600 kilometers in diameter. There are other asteroids closer to the Earth. Scientists have classified 1808 of them within 50 million kilometers of the Earth's orbit as a potential threat. They can be dangerous if it enters the atmosphere.
The Good news is, says Dr. Nugent, what is currently no asteroids that pose a threat to people. It is known only one case where a meteorite hit a person (the so-called asteroid after will fall to the Ground). In 1954, Ann Hodges of Alabama was hit by an asteroid fell through the roof of her house.
Most recently, in February 2013, over Chelyabinsk in Russia, flew and exploded asteroid. This resulted in waves that were broken Windows and damaged some 3,000 buildings. Large collision can be catastrophic: 66 million years ago, the major impact of the body put an end to the dinosaurs and changed the axis of Earth's rotation.
Currently, scientists have identified about 700 000 individual asteroids. Studying them, they can count, where they will be tomorrow and the day after, and after 800 years. "Obviously, we would like to find all the major and close to the Land," says Nugent.
"it's Amazing that you can take a meteorite in your hand and consider. A black hole does not work here".
Now she's looking for new asteroids at Caltech, studying the tiny, previously unseen points of light on images of powerful telescopes, and then tracking their movement. This process still requires the presence of a real person, she says. "The human eye is better suited for this than the technology at the moment."
So, what can we do if an asteroid really is going to threaten life on Earth? One of variants — to launch a massive asteroid spacecraft. It could use its own gravity to output the asteroid onto a new trajectory for several years or even decades. Or the scientists could send a high speed spacecraft, so he either collided with an asteroid, or left out the part that will hit him and deflect off course.
Finally, there is an option of "Armageddon": a nuclear explosion. The film crew blew up the asteroid from the inside. But in real life, not Bruce Willis, who would go and lay the warhead inside the asteroid. Will have to blow it up near.
Most of his time Nugent spends on the computer, considering the image space, creating computer code and checking email. Her daily job is more like an ordinary people than many might think. In her honor named the asteroid 8801 Nugent.
In Addition to possible threats as a result of falling celestial bodies, the study of asteroids helps scientists understand how was the Solar system billions of years ago. In the future it will also be useful: consider the possibility of developing an asteroid for extraction of natural resources like platinum.
Nevertheless, The main goal of Dr. Nugent is to search for near-earth asteroids that may pose a future problem for humanity. She expressed the hope that all such asteroids are on paths that lead them from Earth. But this view of the optimist.
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