Matter. I don't really know how to explain it. Sorry. But anyways, Hope this helps!
Gravitational force is given by, 
Where, m and M are the masses of the objects, R is the distance between them and G gravitational constant.
Gravitational force of the star on planet 1, 
Gravitational force of the star on planet 2, 
Ratio, 

Therefore, the gravitational force of the star on the planet 1 is three times that on planet 2.
Answer:
800pa
Explanation:
There are many students who can not get answers step by step and on time
So there are a wats up group where you can get help step by step and well explained by the trusted experts.
just join
post question
get Instant answer
Your answer will be Radio Waves .
That seems to be the only to make sense. Hope that helps u