Webb looks at the beginnings of the universe Science

The biggest, brightest, most revolutionary. Its results could change space exploration by a maximum of 400 years.

The space telescope James Webb’s burden has been to accumulate many attributes. It’s been about 30 years.

Over the years, the device has accumulated quite a price tag: about $ 11 billion, just under $ 10 billion. Budgets banged.

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Thousands of U.S. space agency NASA employees have a nervous Christmas. Webb will leave for space on Christmas Eve at 2.20 pm Finnish time – weather permitting.

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The destination is more than 1.5 million kilometers away with a stable L2 point in space.

The sonar is carried to the station by the launch vehicle Ariane 5. Photo: Esa

Already at the beginning of the journey, Webb opens his mirror, the parts of which are carefully scythe and packed at the top of the launcher. Air traffic control is also starting to tune the telescope’s equipment.

For real action, Webb will be ready perhaps in June 2022. It will then focus for more than five years on what it is made of.

Mostly, Webb detects distant thermal radiation, or infrared radiation. It has a longer wavelength than visible light, and that’s why Webb tells more about the universe than ordinary telescopes.

Webb’s mirrors are likely to bring a wealth of new information about what the universe was like 13.6 billion years ago. Not so far has been seen directly.

So Webb is like a time machine. Light and radiation come into its devices as they really were a long time ago.

This is because it takes time for light and radiation to hit devices near Earth at the speed of light. The speed of light is the roof speed of the universe.

The entire universe was born about 13.8 billion years ago. However, the stars did not ignite immediately after the beginning, the initial explosion.

The world lived in the dark for at least a hundred million years. The stars did not begin to ignite until the first elements, hydrogen, helium, and lithium, properly accumulated. They gave birth to the first stars.

This was perhaps the case more than 13.6 billion years ago. It was the beginning of the evolution of the universe and its billions of galaxies.

Webb focuses on the beginning of everything. It observes early galaxies and stellar births about 32 percent of the time.

23% are owned by the closest exoplanets and their orbits. Six percent of the time we get the phenomena of our own solar system.

Leading findings Kennet Sembach says that even the first observations have the potential to produce revolutionary results.

The findings may remain subversive in the history of astronomy, he commented in Scientific American.


Source: Tiede by www.tiede.fi.

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