Hubble’s Law
What is Hubble’s Law?
Hubble’s Law is a scientific rule that shows the universe is expanding. It was discovered by Edwin Hubble in 1929. He observed that galaxies are moving away from us, and the farther a galaxy is, the faster it moves away.
Formula
Hubble’s Law can be written as: v = H₀ × d
- v is the velocity at which the galaxy is moving away.
- H₀ is the Hubble constant.
- d is the distance of the galaxy from Earth.
Importance
- It supports the Big Bang Theory, which says the universe started from a single point and has been expanding ever since.
- Helps scientists estimate the age and size of the universe.
Conclusion
Hubble’s Law is one of the key pieces of evidence for the expanding universe. It shows that space itself is stretching, taking galaxies with it.