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2019 Nobel prize in physics

2019 Nobel prize in physics

Tag: GS3 || Science and Technology || Particle physics || Universe and Big bang theory

Why in news?

  • Three scientists- Canadian-American cosmologist James Peebles and Swiss astronomers Michel Mayor and Didier Queloz- have jointly been awarded the 2019 Nobel Prize in physics for encouraging the growth of the “understanding of our place in the Universe”.

Details:

  • Peebles findings:
  • He won one-half of the prize” for theoretical discoveries that have contributed to our understanding of “how the Universe evolved after the Big Bang“.
  • Using theoretical tools and calculations, he drew a link between the temperature of the radiation emitted after the Big Bang and the amount of matter it created.
  • His work showed that the matter known to us — such as stars, planets, and ourselves — only makes up five percent, while the other 95 percent is made up of “unknown dark matter and dark energy”.

Michel Mayor and Didier Queloz:

  • They shared the prize for their discovery of an exoplanet outside our solar system orbiting a solar-type star in the Milky Way.

  • They were able to detect a gaseous ball similar in size to Jupiter, orbiting a star 50 light years from our own Sun.
  • Harnessing the Doppler effect, the pair proved the planet, known as 51 Pegasus b, was orbiting its star.