When is a comet not a comet? Rosetta finds out

(PhysOrg.com) -- It was a case of celestial hit and run. Two asteroids, both in the wrong place at the wrong time. The result: one big trail of debris and a case of mistaken identity. Now, however, ESA’s comet-chaser ...

Russia in secret plan to save Earth from asteroid: official

Russian scientists will soon meet in secret to work on a plan for saving Earth from a possible catastrophic collision with a giant asteroid in 26 years, the head of Russia's space agency said Wednesday.

Spacecraft Could Save Earth from Asteroids

(PhysOrg.com) -- British space engineers working for a space company in Stevenage in England, have designed a "gravity tractor" spacecraft to deflect any asteroids threatening to collide with Earth. The announcement comes ...

Powerful New Technique to Measure Asteroids' Sizes and Shapes

A team of French and Italian astronomers have devised a new method for measuring the size and shape of asteroids that are too small or too far away for traditional techniques, increasing the number of asteroids that can be ...

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