Universe: Gravity • English Conversation Questions

What is gravity and how does it affect objects in the universe?
How does the force of gravity vary across different celestial bodies?
Can gravity exist without mass?
What role does gravity play in the formation of galaxies and other cosmic structures?
How does gravity influence the motion of planets and their orbits around the Sun?
What are some theories or models that attempt to explain the nature of gravity?
Is gravity the same everywhere in the universe?
Can gravity be manipulated or controlled by advanced civilizations?
What are some unanswered questions or mysteries surrounding gravity?
How does gravity affect the behavior of light and other electromagnetic waves?
Could there be alternative forms of gravity that we are not aware of?