You Don't Know Universe?
But they know you. It is time to meet them.
This will not take that long.
As everyone knows, this theory has been in science for a long time. The Big Bang happened 18.8 billion years ago, and it began the birth of the universe. The Big Bang is more about expanding than exploding.
Now we enter the atomic part. Where did Atoms come from? So far, we do not know fully and assume that atoms already exist. Not only that, we have sub-atomic particles that coalesce to produce the first atoms, which are helium, hydrogen, and a little bit of lithium.
In 2015, astronomers found something unexpected. The earliest star that still shines today is the "Population III Star" This star is different from what we see at night. Some theories say this star is huge.
It may also be more massive than the sun and possibly even hotter. A star that is too bright will usually quickly die in an explosion and gain amazing mass to give birth to the next star. Can see this in more depth with the Kurzgesagt video. This star died young.
One of the "Population III stars" should be alive today but the opposite happened. According to an international team led by David Sobral, at the University of Lisbon, Portugal. Scientists use a very large telescope in the Atacama Desert, the Desert in Northern Chile, and also several other telescopes to observe the galaxy from Earth.
Know that light from space takes billions of years to reach us. This shows the galaxy as it looked billions of years ago. Such distant galaxies are generally dim. But some of those that Sobral and his colleagues found are unusually bright.
One in particular is three times as bright as any ancient galaxy seen before 2015. The astronomers dubbed it “Cosmos Redshift 7”, or CR7 for short. The name was chosen for the brightest star in Real Madrid footballers, Cristiano Ronaldo, also known as CR7. Several astronomers like Ronaldo. So why not?
Behind the glorious name, it is not just its brightness that makes CR7’s light unusual. It is composition-or spectrum-is odd, too. Commonly, the light from a galaxy betrays the presence of a vast array of elements: oxygen, iron, silicon, and so on. But CR7’s light contains little more than hydrogen and helium. There are two elements forged in abundance during the Big Bang and two would be found in the earliest universe star.
If the CR7 light has more helium and hydrogen there is a good chance that some of its stars belong in the Population III category. They might be some of the last of their kind in the known Universe. However, there are still many unanswered questions about what astronomers discovered in 2015. If CR7 does contain a Population III star will be another star in a different galaxy?
But now everything in this world move too fast and the technology evolves rapidly. The unanswered question in 2015 might have have an answer in the future when NASA switches on the James Webb Space Telescope, which has the power to probe even deeper, far and reach more than astronomers can right now.
The astronomers does not deny maybe they will find more Population III Star. It may lurk in those far-flung regions. But, If there are many more to be found, CR7 should still retain a special place in astronomer’s hearts. It provided them with their first glimpse of the star that burned brightly to bring the Universe’s Dark Ages to an end.
CR7 is the brightest ancient galaxy was discovered in 2015 by astronomers. In the far away from the lights years. Life will survive.
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