Gravity is one of the four fundamental interactions that exist in nature.
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Clifton concludes by considering the testing and application of general relativity in astrophysics and cosmology, and looks at dark energy and efforts such as string theory to combine Gravity with quantum mechanics.
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Today, almost 100 years after Einstein published his theory of gravity, we have even detected the waves of gravitational radiation that he predicted.
He discusses Einstein\'s theory of gravity, which now supplants Newton\'s, showing how it allows us to understand why the frequency of light changes as it passes through a gravitational field, why GPS satellites need their clocks corrected as they orbit the Earth, and why the orbits of distant neutron stars speed up.
Gravity is not only universal, it is also essential for understanding the behaviour of the Universe, and all astrophysical bodies within it.
In this Very Short Introduction Timothy Clifton looks at the development of our understanding of Gravity since the early observations of Kepler and Newtonian theory.
It was the study of Gravity that led Einstein to his profound realisations about the nature of space and time.
Understanding Gravity is not only essential for understanding the motion of objects on Earth, but also the motion of all celestial objects, and even the expansion of the Universe itself.
It also has the distinction of being the oldest, weakest, and most difficult force to quantize.
Gravity is one of the four fundamental interactions that exist in nature
