Now, a little over a year later, a team of scientists led by the European Space Agency has discovered something pretty special that throws the origins of the first galaxies and stars into question.

After the Big Bang, stars formed.

Scientists believe these early stars were unique due to the fact that some elements found in stars today can only be made within stars.

Put simply, it’s believed that those earliest stars were made of hydrogen, helium and lithium because those were the only elements that were hanging around at the time.

Stars composed of those ingredients are known as Population III stars.

Hubble hunted for these stars by peering into the cosmos at distances so great that the light reaching Earth today originated within from 500 million to 1 billion years of the Big Bang.

If theories about the early universe are correct, Hubble should have been able to spot some Population III stars just hanging out and doing their thing.

Instead, using a new technique that allowed the researchers to better view low-mass galaxies that would originally have remained hidden, they found early galaxies that were more mature than they should have been by that point in the history of the universe.

“These results have profound astrophysical consequences as they show that galaxies must have formed much earlier than we thought,” Rachana Bhatawdekar, lead author of the research, said in a statement.

This means the timeline that some scientists believe documents the beginnings of the universe has been thrown into question, and it’s probable that objects like stars and structures like systems and galaxies began forming way before anyone assumed?

Going forward, it’ll be interesting to see what other evidence can be gleaned from both the Hubble data and other studies that may reveal what the early universe was truly like

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