Science & Tech

Hubble Constantly working to resolve the Universe Expansion Dispute

  • Researchers from India and the United States have devised a novel approach to answering a fundamental question about the universe.
  • This question concerns the rate at which the cosmos is expanding.

Our Universe’s Story

  • The Big Bang, which occurred roughly 13.8 billion years ago, was a huge explosion.
  • The universe became larger over time, with periods of rapid expansion and slowdown.
  • Scientists aim to understand this expansion in order to grasp what’s going on in the universe.

A Big Question About the Hubble Constant

  • The Hubble constant is a unique value that indicates how fast the cosmos is expanding.
  • In 1929, a physicist called Edwin Hubble initially mentioned this number.
  • However, scientists are still divided on its significance.

Two Important Measurements

  • To get the Hubble constant, we must carefully measure two things:
  • How far away are things in space from us?
  • How quickly these things are moving away from us as the cosmos expands.

Old Ways vs. New Concept

  • Until now, astronomers measured the Hubble constant using a few different methods:
  • Looking at supernovae, which are bright explosions in space.
  • Using a particular light from the beginning of the universe.
  • Waves caused by large collisions in space are being studied.
  • However, Indian researchers have proposed a new method of measurement known as “gravitational lensing.”

A Different Perspective on Gravitational Lensing

  • Gravitational lensing is similar to utilising gravity to bend light. Consider it a magnifying glass in space.
  • This concept originated a long time ago but has lately improved.
  • Scientists believe they can measure the Hubble constant using this lensing approach.
  • They want to study at gravity-bending waves from space encounters.
  • These bent waves could reveal how quickly the universe is expanding.

The Big Idea: A Time Travel Bridge

  • This new concept is intriguing because it connects different eras in the history of the universe.
  • It could provide us with a good answer to the Hubble constant.
  • While this concept is interesting, there are significant obstacles to overcome:
  • Making certain that the signals are clear enough to be measured.
  • Using the new way to answer additional questions.
  • If this new method succeeds, it could help us learn more about dark matter and other aspects of the universe.
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