Summary:
- Gravity is one of the four fundamental forces in the universe, along with electromagnetism, the strong nuclear force, and the weak nuclear force.
- Scientists have measured the strength of gravity with greater precision than ever before, using a new technique that involves carefully balancing the pull of gravity against the outward push of centrifugal force.
- This new measurement helps confirm that gravity is a constant, unchanging force, which is an important foundation for our understanding of the universe and how it works.