The nuclear bomb and the giant slingshot ideas failed?

Going through nine different ways to save Earth from a meteor, it was decided this was feasible:

London, England (AHN) - Scientists at the University of Glasgow say that flying mirrors could save earth from a catastrophic asteroid collision. In assessing a number of plans for diverting asteroids that could hit the Earth, the researchers have concluded that mirrors offer the best solution.

The plan called "solar sublimation" focuses space-based mirrors onto the object to heat it up and deflect its course. An object 150 meters across could be diverted by 100 mirrors in just a few days, according to the researchers.

Scientists now plan to use up to 5,000 mirrors to focus a beam of sunlight on to the asteroid that would in turn melt the rock and alter its orbital path away from earth.
The announcement came after the scientists compared nine different methods of deflecting near earth objects - asteroids and comets.

Project leader Dr. Massimiliano Vasile told the BBC, "Asteroid impacts are a real threat. The Tunguska explosion in 1908 devastated an area bigger than Greater London.

"With only 10 spacecraft flying in formation, each with a 20-metre mirror, we could deflect a similar sized asteroid into a safe orbit in about six months. Our studies show that this technology is genuinely feasible," he added.

And more astronomy:

Hawaii (AHN) - A tiny galaxy located 6 billion light-years away, or nearly halfway across the universe has recently been spotted and weighed by astronomers at an observatory in Hawaii.

It was discovered by Phil Marshall of the University of California, Santa Barbara and his colleagues. The galaxy was dubbed SDSSJ0737+3216. It is 100 times lighter than Earth's own Milky Way and it is the smallest galaxy ever identified at that distance.

It is about half the size and approximately one-tenth the "weight" of typical small galaxies found closer to Earth.

SDSSJ0737+3216 was discovered using NASA's Hubble Space Telescope and the W.M. Keck Observatory in Hawaii.

It was made visible by a phenomenon called gravity lensing, whereby light from a distant source is warped by the gravitational field of another massive object located directly in front of it.

I love stories like these. Scientists discovering stuff.