Is an Asteroid Heading for Earth?
Investigate the solar systems secrets.
Throughout our solar system, asteroids and comets are orbiting the Sun. Some, called Near-Earth-Objects (or NEOs), have orbits that bring them close to Earth. Discover more about NEOs at the NASA site, Asteroid and Comet Impact Hazards:http://impact.arc.nasa.gov/
You can also learn about the Torino Scale, which measures the potential damage from objects striking Earth.