James-Webb reveals galaxies aged 13 billion years

The James-Webb telescope continues to surprise astrophysicists. Therefore, Thanks to his unique ability to capture infrared light, he revealed old galaxies over 13 billion years. Meanwhile, A fascinating dive in the origins of the universe.

A telescope designed to go back in cosmic time to the first galactic lights – James-webb reveals galaxies aged 13

Since its orbit in 2021. Nevertheless, more than a million kilometers from the earth, the James-Webb telescope has captured light from the most remote corners of the universe. Moreover, What we see today james-webb reveals galaxies aged 13 are images of the past. Furthermore, The light of these galaxies took more than 13 billion years to achieve us. Furthermore, Each snapshot taken by webb constitutes a fragment of cosmic history and a photograph of the young universe.

Unlike Hubble, which observes in the visible spectrum, Webb is designed to capture infrared light. Similarly, This design meets a specific need. Therefore, Due to the expansion of the universe. the visible light emitted by the first galaxies james-webb reveals galaxies aged 13 has stretched until it becomes infrared. To capture this weakened light, webb uses ultra-preccimate sensors. These are cooled at extreme temperatures thanks to a huge thermal shield equivalent to a tennis court.

Ultrasensible sensors revealing the invisible heat of stars in formation – James-webb reveals galaxies aged 13

At the heart of this revolutionary telescope are two major instruments: Nircamto observe the light close to infrared. and MIRIwhich detects even longer wavelengths. Nircam analyzes the structure and composition of galaxies. He does so by breaking down the light according to his wavelengths, real Chemical imprint of the universe. For his part, Miri spots the coldest objects, such as nascent stars or distant planets, scrutinizing tiny thermal variations.

These instruments are of such sensitivity that they could, in theory, detect the heat of a buzz on the moon. To avoid any thermal interference, webb remains at icy temperatures close to absolute zero. Miri even has his james-webb reveals galaxies aged 13 own cryorefrigerator in order to remain even colder. This makes it possible to capture the most tenuous signals.

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Light data transformed into indices on the birth of the universe

When the light collected by webb reaches its sensors. it is transformed into digital signals. These data is then processed on earth. Scientists attribute colors to different wavelengths james-webb reveals galaxies aged 13 to create images. These colors do not correspond to what the human eye would seebut they make it possible to decode the structure. age and composition of the observed galaxies.

These shots are not simple images. They reveal extremely young galaxies. formed just after the big bangand enrich our knowledge on the supermassive black holes or the first stars. Thanks to the power of its sensors and its 6.5 meter golden mirror, webb reaches unprecedented precision.

A scientific tool redrawing our vision of the cosmos

What James-Webb reveals goes beyond all expectations. Each observation arouses new questions. She calls into question established theories and push the limits of our understanding. The telescope is not content to explore the space. It questions our place in the universe and our ability to understand its complexity.

With webb, james-webb reveals galaxies aged 13 Astronomy experiences a real Renaissance. And everything suggests that we are only in the beginnings.

Source – theconversation.com : how can the james webb space telescope see so far