The answer explains the expansion of the universe through Hubble's Law and cosmological redshift, as well as the basics of the Big Bang theory, dark energy, and dark matter.
Hubble's Law: Hubble's law states that the velocity at which a distant galaxy is moving away from us is directly proportional to its distance. This provides evidence for an expanding universe.
Cosmological Redshift: Cosmological expansion results in the redshift of light from distant galaxies, indicating their movement away from us and supporting the idea of an expanding universe.
Formation: The Big Bang theory explains that the universe began as a singularity and has been expanding ever since, leading to the creation of all matter and energy we observe today.
Dark Energy and Dark Matter: Dark energy is the mysterious force driving the acceleration of this expansion, while dark matter is a form of matter that does not emit light but influences the dynamics of galaxies and cosmic structures.
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