Space collision

2. ______meteorites: Composed of iron and nickel which are extremely dense.
3. Meteorite is a solid piece of _______ from an object, such as a comet, asteroid, or meteoroid, that originates in outer space.
5. _______meteorite: Most common type of meteorite.
8. ______impactor: Launch a spacecraft to collide with the asteroid and alter its trajectory.
10. ________coordination on what spacefaring countries will do what to prevent an impact.
11. Objects in space collide with Earth when their orbital paths ___________.
13. ______tractor: Position a spacecraft near the asteroid and use its gravitational force to gradually change the asteroid's course.

1. Earth crossing asteroids usually lie between ________ and Mars.
4. _______meteorite: Stony-iron meteorites form in places where metal and silicate are mixed.
6. gravity of both objects pulls them together causing the asteroid to ____________ towards the planet's surface and collide.
7. An Earth-crosser is a near-Earth asteroid whose orbit crosses that of Earth as observed from the __________ pole of Earth's orbit.
9. ______deflector: Detonate a nuclear device near the asteroid to alter its trajectory.
12. _______ missions provide valuable data for future deflection efforts.