What is gravity?
Isaac Newton described gravity as an attractive force between massive objects that causes the acceleration of falling bodies.
Albert Einstein described gravity as a consequence of the curved geometry of space and time.
Einstein’s theory has a greater explanatory scope than Newton’s theory because it predicts phenomena that Newton’s force model cannot explain.
Examples of such phenomena are gravitational waves and gravitational time dilation.
Want to learn more?
General relativity connects gravity to the geometry of space and time. This connection gives often rise to conceptual confusions. Together with colleagues in Australia and Germany, I have tried to clarify confusing concepts related to gravity.