The Limited Times

Now you can see non-English news...

Asteroids: planetary defense is finally interested in the smallest objects


DECRYPTION - NASA has struck and deflected an asteroid for the first time. Measuring 160 meters in diameter, this object highlights the danger that these smaller projectiles can represent for the Earth.

On February 15, 2013, at 9:20 a.m., a bolide exploded in the sky above the city of Chelyabinsk, in the Russian Urals.

The shock wave shatters windows for miles around, and thousands of people, drawn to their windows by the excess brightness in the sky that preceded the explosion, are injured.

It is now estimated that the power of the explosion was equivalent to 500 kilotons of TNT, or about 30 times that of the bomb dropped on Hiroshima in 1945.

“The object that exploded over Chelyabinsk was small, it was 20 meters in diameter, and no one saw it coming, because it was coming from the direction of the Sun, an area of ​​the sky where telescopes cannot observe”

, explains Jérémie Vaubaillon, astronomer at the Paris Observatory and specialist in the trajectories of small bodies in the solar system.

The probabilities of a large impact

The event surprises everyone, and reminds us that the danger of asteroids for our planet is not limited to giant objects, over 1 kilometer...

This article is for subscribers only.

You have 68% left to discover.

Pushing back the limits of science is also freedom.

Keep reading your article for €0.99 for the first month


Already subscribed?


Source: lefigaro

All tech articles on 2022-09-27

You may like

News/Politics 2022-09-17T13:07:28.482Z

Trends 24h


© Communities 2019 - Privacy