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Mahesh

14/07/22 12:18 PM IST

NASA’s new space telescope reveals deepest look of the cosmos ever captured

In News 
  • The first image from NASA’s new space telescope unveiled is brimming with galaxies and offers the deepest look of the cosmos ever captured.
James Webb 
  • Infrared observatory that will be much more powerful than the presently deployed Hubble space telescope.
  • JSWT will observe in near-infrared light rather than light in the visible part of the spectrum (unlike Hubble) and thus it will have a much greater capacity to see obscure stars and galaxies
  • It is a joint venture of NASA (US), ESA (Europe), and CSA (Canada)
  • Webb was formerly known as the “Next Generation Space Telescope” (NGST) and it was renamed in 2002 after a former NASA administrator, James Webb.
Significance 
  • Part of the image is light from not too long after the Big Bang, which was 8 billion years ago.
  • James Webb can see backwards in time to just after the Big Bang by looking for galaxies that are so far away that the light has taken many billions of years to get from those galaxies to our telescopes
  • JSWT has the largest mirror in space and it will look deeper into the universe – and thus further back in time – than is possible with a presently deployed telescope such as Hubble
  • Mysteries such as what made the universe expand so quickly less than a nanosecond after the Big Bang
  • The Dark Ages is the period before gravity formed the first stars and galaxies that eventually began to emit the first light.
Source- Indian Express 

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