Newton's law of universal gravitation works well in ordinary situations on earth, but it does not work well

For large masses,It does not work well

Explanation:

Newton's law of universal gravitation :

  In the universe every particle attract the other particle by a force and this force is directly proportional to product of their masses and inversely proportional to distance between these two masses.This law given as follows

Where G is the constant.

Th one limitation of this law that the masses should not be too large.So this law does not work well for large bodies.

i don't understand. explain it clearly