Earliest starlight of universe discovered by Nasa’s JWST in cosmic fog

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The James Webb Space Telescope (JWST) has looked back in time to help explain the reionisation phase, which is one of the greatest mysteries in the cosmos.

After a protracted era known as the cosmic dark ages, this phase in the cosmic timeline is believed to have been initiated by the birth of the first stars and galaxies, according to Interesting Engineering.

The question of how the early cosmos broke out of the cosmic dark ages has been a subject of scientific inquiry.

With the most precise data ever on this cosmic dawn, the powerful space telescope has shed light on the first billion years of the universe.

The results imply that the reionisation of the early universe was probably initiated by the young galaxies.

“They were incredibly energetic stars in many, many tiny little galaxies,” said Joel Leja, assistant professor of astronomy and astrophysics at Penn State and author of the paper.

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