This galaxy is about 13,000 million years old and emits more ultraviolet radiation than others of a similar age. It also has another strange characteristic: the interstellar gas it contains does not seem to have elements such as carbon and oxygen, which are created inside massive stars and are thrown into space when they explode as a supernova.
To explain this glaring absence, astronomers think that possibly the stars that are being formed are of the first generation, that is, that the material from which they are born comes directly from the Big Bang. They are the first stars formed after the outbreak that gave rise to the universe. That is why in CR7 there has not been time to enrich the galactic environment with heavy elements thanks to supernova explosions.
And most interestingly, black holes have not been formed either, which is one of the possible remains of a star after it explodes. And that is the extraordinary thing because if the detected emission comes from a black hole we would be facing the first known 'direct collapse', or what is the same, that the black hole has been formed directly from interstellar gas and dust. This solution also provides arguments to solve one of the enigmas of astrophysics: how super black holes appeared in the center of galaxies.
