P2g

P2g

1. Facts

   • An asteroid is a rock which orbits the Sun.
   • The Moon is a natural satellite of Earth
   • Comets are balls of ice and dust.
   • Comets have highly elliptical orbits and come from outside of Pluto’s orbit.
   • Closest to a star a comet has a stronger gravitational pull, so it speeds up.
   • A NEO is a Near Earth Object (asteroid or comet) which may collide with Earth.
   • We use telescopes and satellites to monitor NEOs.
   • If a NEO is approaching we can launch a rocket containing explosives to break the NEO up