Wednesday, February 1, 2023

La Jornada: James Webb’s extraordinary images herald a big surprise

▲ Artist’s impression of several planets orbiting the ultracool red dwarf star TRAPPIST-1.photo europe press

AFP

Newspaper La Jornada
Wednesday 28 December 2022, p. 2

Paris. space telescope james webb, In orbit since the middle of the year to probe the boundaries of the universe and the environments of distant planets, it provided exceptional images during 2022, which may come in the not-too-distant future.

Results for Web, Located at a distance of 1.5 million kilometers from Earth, which is much more than the old telescope hubble, which is still in operation, but without the precision of the lenses of its younger competitor.

thanks for the successful launch james webb It should work for at least 20 years instead of 10 years initially.

it behaves better than we expectedMassimo Stiavelli, head of mission at the Institute of Space Telescope Sciences, who piloted this 6.5-tonne device, assured AFP.

Equipment is more efficient, lenses are more accurate and stableWhich is important for getting sharp images, he explained.

images that come from Web are initially invisible to the human eye, as it operates essentially in the infrared spectrum, unlike Hubble.

However, thanks to the stunning color of those pictures, he has managed to surprise the fans.

with that frequency of infrared waves, james webb It can trace the faintest light paths in the universe, i.e. the dawn of its birth without being affected by stellar nebulae, or analyze the atmospheres of exoplanets with a spectrograph.

launch telescope aboard Ariane 5, In late 2021, it crowns an odyssey begun by NASA more than 30 years ago.

After several setbacks, an investment of $10 billion and contributions from 10,000 people, the telescope was finally installed in its orbit in the middle of the boreal summer, notably with the deployment of a sunshade the size of a football field. Tennis.

Its main mirror, 6.5 meters in diameter, had 18 petals that were slowly opened and calibrated until unrivaled precision was reached, with a margin of error of only one micron.

Web Five images were sent on July 12, 2022, that revealed its capabilities: thousands of galaxies, some of which formed soon after big Bang, 13.8 billion years ago.

Months later he was able to photograph Jupiter in great detail, which would help understand the inner workings of this giant gas planet.

Other stunning color images were the Pillars of Creation, giant structures of gas and dust filled with stars in tones of blue, red and brown.

These pictures and data invite scientists Review their model of star formationAdded NASA.

Just five months after going into operation, the telescope gave astronomers a glimpse of a galaxy that formed exactly 350 million years after the spacecraft. big Bang.

These galaxy formations are much brighter than previously thought and may have formed much earlier than previously thought.

“We have an ‘excess’ of galaxies in relation to theoretical models in the distant universe,” David Elbaz, scientific director of the astrophysics department of the French Commission for Atomic Energy and Alternative Energy, told AFP.

there where Hubble i only saw irregularly shaped galaxiesaccuracy of Web turns them into spectacular galactic spirals in the same way as us.

kinda universal agenda Which can help to know the formation of stars.

With regard to exoplanets, the first confirmation of the presence of carbon dioxide in the atmosphere of Wasp 39-b was achieved, in the clouds of which photochemical events may have occurred.

According to Stiavelli, these foreshadow the first observations big surprise In the not too distant future.

Nation World News Desk
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