Dark matter: a topic that matters
An appalling issue for physicists is that there is an ever increasing number of mysteries that we have not been able to solve just yet. One of the topics that keeps us awake at night is dark matter. Today I am going to talk about some of the observations that have led us to theorize about dark matter and the difficulties of measuring it. Our problems are the following: there are stars orbiting the center of their galaxies faster than it should be possible for them to do. If they were moving at such high velocity, they should, somehow, fly away. But they don’t. Therefore, there must be something offsetting that velocity, and that is where dark matter enters the game. Another strange occurance is the warping of light around a massive body, called gravitational lensing. This is a phenomenon that occurs when a massive celestial body, such as a galaxy cluster, causes a sufficient curvature of spacetime for the path of light around it to be visibly bent, as if by a lens. But there is bending
