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For years, scientists believed the universe was 13.8 billion years old. But a new research challenges this belief. Let us see more about this research.
Observations from the James Webb Space Telescope (JWST) suggest that the universe could be almost twice as old as previously believed.
The JWST isn’t just designed to take clear images, it is built to look deeper into space and further back in time.
It detects ancient light from the earliest galaxies, offering clues about the origins and age of the cosmos.
The JWST found 'impossible early galaxies', ancient structures that formed just 500 to 800 million years after the Big Bang.
To understand this mystery, it’s crucial to know how astronomers measure distances and time in space.
They rely on redshift where light stretches towards red as galaxies move away, helping measure how far and how old they are.
The farther a galaxy is, the more its light shifts toward the red part of the spectrum. This redshift is similar to how sound changes with the Doppler effect.
The JWST detects this redshift with unmatched accuracy, offering a glimpse into galaxies formed at the very edge of time.
In the 1990s, data from the Hubble telescope suggested the universe could be anywhere between 7 and 20 billion years old.
These 'impossible early galaxies' look too big, too developed and too old to exist in a universe that is only 13.8 billion years old.
One scientist aptly described the situation as "seeing a toddler with the wisdom of an octogenarian". This finding doesn't fit current models.
The universe, once believed to be 13.8 billion years old, may actually be 26.7 billion years old as the JWST’s discoveries could completely rewrite the story of our cosmos.
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