The Moon acts like an asteroid magnet and has been aggregating asteroids for billions of years.

FORBES: The Moon is a Natural Platform for Asteroid Mining, Detection and Deflection

The close fly-by of an asteroid like DA14, like the Tunguska meteor, is a once-in-1, 000-years event.

CNN: A meteor and asteroid: 1 in 100 million odds

The close fly-by of an asteroid like DA14, like the Tunguska meteor, is a once-in-100-years event.

CNN: A meteor and asteroid: 1 in 100 million odds

Whether that's a Justin Bieber concert or a Psy concert or an asteroid flyby like we had the other day from NASA (that had about the same viewership as the Sony PlayStation -- 8 million people, and one million concurrents as well), all the way down to your local high school football game.

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Published photographs make the contoured and perforated stainless-steel screen that wraps the structure like a second skin look as if it has been hit by an asteroid.

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If the question is life - and that's one of the most profound questions we can ask, he says - the answer is almost certainly not Mars or an asteroid, but rather the icy moons orbiting distant planets like Saturn and Jupiter.

BBC: Is Nasa looking in the wrong place for life?

Unlike many cosmic rockers, Asteroid No. 4 grounds itself enough to keep the record from sounding like an interstellar jam session.

NPR: The Asteroid No. 4: 'Let It Go'

The ways to deal with the threat include simply flying a spacecraft into an errant asteroid or either attaching one to it or parking one alongside it, like a gravity tractor, to pull it into another orbit.

CNN: Space's threat to civilization