Paul Chodas from NASA's CNEOS says the exercise will be the same as if the asteroid were on course to hit Earth.
Don't cry too much about Cassini. Upcoming missions are going to Mars, Mercury, the Sun, Europa and several asteroids.
You will not get another chance to see Florence in centuries but you have some very good options this weekend.
Florence is three miles wide and will pass at a distance of over 145 million miles.
A house-sized asteroid will pass by Earth at a distance of as little as 4,200 miles in October.
A newly discovered branch of the Taurids meteor stream increases the risk to Earth but is a "lottery," scientists say.
Newly discovered crater in the Falklands may correspond with the Great Dying event 250 million years ago.
Named 'Analemma,' the building would move around the world, slowing down over New York.
Asteroid 163899 will be passing by, 6.7 million miles away.
An asteroid could provide the base for our Empire's digs, Brian Muirhead says.
The moon will appear large, bright and red, but it doesn't spell doom.
NASA "did not expect to be this puzzled" by the appearance of two reflective lights on the protoplanet.