The five greatest balls of fire over Earth

We live on a moving target in a cosmic firing range. Each day, the Earth is bombarded by about a hundred tonnes of space debris. It may sound alarming, but this is really nothing to worry about. Most of the objects that fall ...

The properties of a six-meter near-Earth object

(Phys.org) —Near Earth Objects (NEOs) are asteroids (or comets) whose orbits sometimes bring them close to the earth's orbit. Thus they could potentially collide with the Earth, giving them considerably more parochial interest ...

After Chelyabinsk: European experts assess asteroid options

(Phys.org) —In February, a speeding asteroid slammed into our atmosphere and exploded high over Russia's Ural region, injuring hundreds and causing millions of euros of damage. What should we do if we have a similar – ...

Russia halts search for meteorite

Russian authorities halted their search Sunday for the meteorite that spectacularly struck the Urals last week, leaving about 1,200 people injured and damaging several thousand buildings.

Tunguska, 1908: Russia's greatest cosmic mystery

The stunning burning-up of a meteor over Russia on Friday that unleashed a shockwave injuring hundreds of people appears to be the country's most dramatic cosmic experience since the historic Tunguska Event of June 1908.

Getting WISE About Nemesis

Is our Sun part of a binary star system? An unseen companion star, nicknamed 'Nemesis,' may be sending comets towards Earth. If Nemesis exists, NASA's new WISE telescope should be able to spot it.

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