Last week a telescope at the University of Hawaii was turned towards the skies in search of asteroids and other objects that could pose a threat to Earth.
If there is sufficient warning that an object in space presents a danger, it may be possible to fend it off, and avert a reoccurrence of what [...]

An interesting side project, a Twitter page that issues tweets every time a meteor, asteroid, or other threatening object, passes within 0.2 AU of Earth.
Those fine folk at NASA run the Near Earth Object database keeping track of the relatively large ones, including a special section for those that actually, possibly, might hit us. Of [...]

The Association of Space Explorers (ASE) is calling on the United Nations (UN) to co-ordinate efforts to defend Earth from “potentially catastrophic asteroid threats“.
The report asks the UN to assume responsibility for responding to potentially catastrophic asteroid threats. “For 4.5 billion years, we’ve been bashed continuously by asteroids. It’s time for that to stop,” former [...]

Should the radio telescopes that are (or are not, as the case may be) patrolling the skies, detect an asteroid that potentially poses a threat to Earth, a space probe which acts as a “gravity tractor” may be our first, and possibly only, line of defence against disaster.
A “gravity tractor” could deflect an Earth-threatening asteroid [...]