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NASA, world experts withhold training for possible asteroid attack



We sometimes hear news in which [A] asteroids pass near Earth, with the possibility of a catastrophic outcome if there was a direct hit.

But most experts agree that there is little likelihood that large asteroids or other space objects will collide on Earth and cause great destruction.

Many organizations recognize the real risk of such an event. An example is NASA, the space agency of the US government. NASA and its international partners are constantly searching for what scientists call Near Earth Objects (NEOs). These objects include asteroids and comets that are within 50 million kilometers of Earth orbit.

This week, NASA is working with the US Federal Emergency Management Agency (FEMA) and international experts to investigate the possibility of a NEO on Earth. At a conference near Washington, DC, scientists will simulate a fictional asteroid to find out what could happen if a real hit is defended.

What is an asteroid?

An asteroid is a rocky, airless object. Asteroids are sometimes referred to as minor planets. They are left over from the early formation of our solar system about 4.6 million years ago. Most asteroids can orbit the sun between the planets of Mars and Jupiter. NASA reports that scientists have identified more than 795,000 asteroids in total.

  This image, provided by NASA, shows Comet Temple 1<div class="e3lan e3lan-in-post1"><script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
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</script></div> in its surface about five minutes before the impact of the Deep Impact probe. It was picked up by the impactor target sensor of the probe. (AP Photo / NASA, JPL)

This image, provided by NASA, shows comet Temple 1 in the surface about five minutes before the Deep Impact probe collapsed. It was picked up by the impactor target sensor of the probe. (AP Photo / NASA, JPL)

A comet is a small, sometimes active object that contains ice. In sunlight, the Eisdose can evaporate to a dust and gas atmosphere.

NASA reports that an asteroid the size of an automobile passes into the Earth's atmosphere about once a year. Such objects turn into a fireball and burn before they reach the Earth's surface.

About every 2,000 years, a much larger object hits Earth and causes great damage. However, NASA experts say that an object large enough to threaten Earth's civilization occurs only every few million years.

Asteroid Simulation

The Assembly this week – from April 29 to May 3 – is called the Planetary Defense Conference. Participants from NASA, FEMA and other government agencies and experts from around the world will participate in a simulated test exercise.

The "Table Exercise" considered a false threat from an asteroid invented by NASA's Jet Propulsion Laboratory (JPL). Groups will investigate possible emergency and response measures to deal with man-made asteroid hazards.

Lindley Johnson is a NASA planetary defense officer. He said the exercise would be an opportunity to create better international preparation and response in the event of a real threat. "This … will help us develop more effective communication with each other and with our governments," he added.

The exercise is based on the invented discovery of a NEO that, according to conference organizers, will hit Earth 2027. The exercise estimates the 1: 100 chance that the NEO hits the planet.

NASA officials say the international community has decided that in real life, a 1 in 100 chance would be enough to think about a defensive and emergency response.

  A computer graphics handout image shows the Japan Aerospace Exploration Agency's Hayabusa 2 probe reaching the asteroid Ryugu. This image was published by the Japan Aerospace Exploration Agency and received by Reuters on February 22, 2019. A Computer Graphics The handout image shows that the Japan Aerospace Exploration Agency's Hayabusa 2 probe is reaching the asteroid Ryugu. This image was published by the Japan Aerospace Exploration Agency and received by Reuters on February 22, 2019. </span><br />
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<p>  Press release that a real asteroid should pass near Earth in 2029. This asteroid, called Apophis, is one of the most important NEOs ever discovered. </p>
<p>  NASA predicts that Apophis will pass Earth on Friday, April 13, 2029, within 31,300 kilometers of the Earth's surface. This is closer than the place where weather satellites circle our planet. </p>
<p>  It is estimated that Apophis is about 340 meters long from end to end. Experts say that if such an asteroid hit Earth, it would cause great damage to the surface of the planet and our civilization. </p>
<p>  However, NASA has clearly stated that it does not believe that Apophis will hit Earth in 2029. NASA says it's a great opportunity for scientists to study the asteroid. </p><div><script async src=

In the future, the world community may also decide to send a spacecraft to Apophis, the press release said.

I am Bryan Lynn. 19659026] Bryan Lynn wrote this story for VOA Learning English, based on reports from NASA and the International Academy of Astronautics. George Grow was the publisher.

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words in this story [19659036] Asteroid – n . a rocky object that goes around the sun like a planet

simulate v. create something that behaves or looks like something real, but does not vaporize [194559003] v. Convert from a solid or a liquid into a gas


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