A new challenge to understand the universe; Does dark matter exist?

Using data from the James Webb Space Telescope (JWST), astronomers have made a surprising discovery. Very old galaxies, formed at the beginning of the universe, are much larger and brighter than expected. This finding challenges the standard model of cosmology, which is based on the existence of dark matter.

According to the scientific news department of Techna Technology Media, scientists have proposed the existence of an invisible substance called dark matter to explain phenomena such as the rapid rotation of galaxies. This substance does not interact with normal matter and has not been directly observed so far. The standard model of cosmology is based on the assumption that dark matter constitutes a major part of the mass of the universe and has played an important role in the formation of cosmic structures. But new observations from the James Webb Telescope show that early galaxies grew much faster than the Standard Model predicts. This finding contradicts the hypothesis of the existence of dark matter.

To explain these observations, scientists have turned to a theory called modified Newtonian dynamics (MOND). This theory suggests that on large cosmic scales, gravity works in a different way than Newton described. In other words, there is no need for dark matter to explain phenomena such as the rapid rotation of galaxies.

* Standard model of cosmology: It is based on the existence of dark matter to explain cosmic structures. This model matches many observations but cannot fully explain some phenomena observed in early galaxies.

* Modified Newtonian dynamics (MOND): does not require dark matter and can explain many cosmic observations by modifying the laws of gravity on large scales. However, this theory is still not fully developed and some of its details are unclear. New findings from the James Webb Telescope pose a serious challenge to the Standard Model of cosmology. If these findings are confirmed, it may require a fundamental revision of our understanding of the cosmos.