Most of what we know about the universe comes from light. We map the heavens by capturing photons emitted by stars, nebulae, and distant galaxies. Yet, according to current astrophysical models, this visible matter is a mere fraction of the whole. Roughly 25 percent of the universe is composed of \"dark matter,\" a substance that neither emits, reflects, nor absorbs light, rendering it effectively invisible to every telescope ever built.
Its presence is felt rather than seen. Scientists have long observed that galaxies rotate at speeds that should, by the laws of known physics, cause them to fly apart. The fact that they remain intact suggests the presence of a massive, unseen scaffolding providing extra gravitational pull. This invisible mass acts as a cosmic glue, shaping the large-scale structure of the universe while remaining stubbornly outside our visual grasp.
The search for the particle or force behind dark matter remains one of the most profound challenges in modern science. It represents a fundamental gap in our understanding of reality—a reminder that the majority of our universe operates in a shadow we have yet to illuminate. While we can measure its influence on the motion of stars, the true nature of this silent majority remains one of the great unwritten chapters of physics.
With reporting from Exame Inovação.
Source · Exame Inovação
