What are the small bits of rock and metal that collide with ...

[Lisaclaire]

What are the small bits of rock and metal that collide with Earth's atmosphere?
 
  a. meteors
 b. comets
 c. asteroids
 d. meteorites
 e. meteoroids

Question 2

Remember Kepler's third law, which relates the period of revolution to the average distance to a planet. How do we modify that law to use with binary stars?
 
  a. Add the total mass of the two stars.
 b. Add Newton's Law of Gravitation.
 c. Add Einstein's Law of Relativity.
 d. Add the difference of their masses.
 e. Add the distance between the two stars.

[frre432]

Answer to Question 1

a

Answer to Question 2

a

[Lisaclaire]

Thanks for the timely response, appreciate it

[xiaomengxian]

Great answer, keep it coming