Big Bang – आवारा मुसाफिर

Early Universe ran in extreme slow motion!

July 3, 2023819 Views

Quasar ‘clocks’ show it was five times slower soon after the Big Bang Scientists have for the first time observed the early universe running in extreme slow motion, unlocking one of the mysteries of Einstein’s expanding universe. Einstein’s general theory of relativity means that we should observe the distant – and hence ancient – universe running much slower than the present day. However, peering back that far in time has proven elusive. Scientists have now cracked that mystery by using quasars as ‘clocks'. “Looking back to a time when the universe was just over a billion years old, we see time appearing to flow five times slower,” said lead author of the study, Professor Geraint Lewis from the School of Physics and Sydney Institute for Astronomy at the University of Sydney. ...

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Astronomers find leftovers of the first stars

AWARA MUSAFIR BUREAU

May 4, 2023746 Views

Using ESO’s Very Large Telescope (VLT), researchers have found for the first time the fingerprints left by the explosion of the first stars in the Universe. They detected three distant gas clouds whose chemical composition matches what we expect from the first stellar explosions. These findings bring us one step closer to understanding the nature of the first stars that formed after the Big Bang. This artist’s impression shows a distant gas cloud that contains different chemical elements, illustrated here with schematic representations of various atoms. Credit:ESO/L. Calçada, M. Kornmesser “For the first time ever, we were able to identify the chemical traces of the explosions of the first stars in very distant gas clouds,” says Andrea Saccardi, a PhD student at the Observatoire de ...

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Baby stars, dancing galaxies: A new range of cosmic views

AWARA MUSAFIR BUREAU

July 13, 2022265 Views

A sparkling landscape of baby stars. A foamy blue and orange view of a dying star. Five galaxies in a cosmic dance. The splendors of the universe glowed in a new batch of images released Tuesday from NASA’s powerful new telescope. The unveiling from the James Webb Space Telescope began Monday at the White House with a sneak peek of the first shot — a jumble of distant galaxies that went deeper into the cosmos than humanity has ever seen. Two full-color images from NASA's James Webb Space Telescope, a revolutionary apparatus designed to peer through the cosmos to the dawn of the universe, show composites made from images at Mid-Infrared (L) & Near-Infrared (R) and released July 12, 2022. NASA, ESA, CSA, STScI, Webb ERO Production Team/Handout via REUTERS Then on Tuesday, NASA ...