Astronomers are rethinking their beliefs about how the earliest stars formed after discovering two of the earliest galaxies ever seen.

The researchers said that the observations made their heads explode. It's a new chapter in astronomy. It is similar to an archaeological dig when you discover a lost city. It's just incredible.

Two of the most distant galaxies seen to date are captured in these Webb pictures of the outer regions of the giant galaxy cluster Abell 2744. The galaxies are not inside the cluster, but many billions of light-years behind it. 
Two of the most distant galaxies seen to date are captured in these Webb pictures of the outer regions of the giant galaxy cluster Abell 2744. The galaxies are not inside the cluster, but many billions of light-years behind it. NASA, ESA, CSA, T. Treu (UCLA)

It is believed that the two galaxies are billions of years old. Some of the earliest galaxies can be seen thanks to the fact that it operates in the IR range.

Light from a distant galaxy is moved to the red end of the spectrum because of the expansion of the universe. The shift has an effect on the distance from the galaxy. The light from some galaxies is moving out of the visible light spectrum and into theIR where it can be seen. Thanks to better calibration of the instruments, the results of previous research are not as accurate as they used to be.

It's possible to see even more distant galaxies behind a massive object that warps space and acts like a magnifying glass.

Researchers had thought the galaxies would be dull, but they are much brighter than expected. In the first few days of the observations, they were spotted very quickly, suggesting that early galaxies could be more plentiful than previously thought.

We have nailed something that is really interesting. It would have taken 100 million years for the universe to come together. The researchers didn't expect the dark ages to end so early. One hundredth of the current age is how much the primordial Universe would have been. It is a small amount of time in the 13 billion-year-old universe.

The early galaxies could be much more massive than thought, with many more stars than expected, or they could be less massive, but with stars that shined very brightly and are different from the stars we see today. To learn more and to confirm the age of these universes, the researchers plan to perform more observations.

Everything we look at is new. "Webb is showing us that there is more than we thought." It has surprised us again. The early galaxies are very different.

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