TNPSC Thervupettagam

Hubble Tension

April 21 , 2024 13 days 156 0
  • Scientists from Germany and the U.K. have proposed a radical explanation for the discrepancy in measurements of the universe’s expansion rate, known as the Hubble tension.
  • New data from the James Webb Space Telescope (JWST) also confirms a long-standing mystery.
  • It is the expansion rate of the universe we see today doesn't match what we expect based on the early universe.
  • Using observations of the young universe, scientists can calculate an expected expansion rate for the present day.
  • They can also directly measure the current expansion with special objects called "standard candles."
  • When these two values are compared, they disagree significantly.
  • The Hubble constant, denoted as H0, describes the rate at which galaxies are moving away from each other due to the expansion of the universe.

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