The expansion of the universe is a phenomenon that has puzzled scientists for decades. Just like when we bake a fruit cake, the dough expands in the pan, but with the universe, it’s different. Unlike the dough, which can expand into something new, the universe expands into itself.
According to physicist Nikol Granucci, if there was a “pan” or a boundary for the universe to expand into, it would be part of the universe itself. The expansion is more like a self-contained process. This concept challenges our understanding of space and time.
Scientists track other galaxies moving away from our Milky Way to measure the speed of expansion. By analyzing this movement, they can imagine the spread without asking where it goes. This method has confirmed that the entire universe is expanding, with an increasing rate.
One of the biggest mysteries surrounding the expansion is what drives it. Scientists have proposed dark energy as a solution, but its source remains unknown. Researchers believe dark energy accounts for 68% of the total energy in the universe, while everyday matter makes up only about 5%.
Beyond our known universe, some scientists hypothesize the existence of multiple universes. This theory could solve current physics problems by integrating quantum mechanics and gravity.
However, researchers face a major challenge when trying to study gravity at the quantum level. Theories like string theory, loop theory, and others attempt to explain how these concepts work together. Ultimately, the universe will continue to expand, growing further apart from galaxies over time.
Source: https://en.vijesti.me/news-b/science/736446/how-the-universe-expands-if-it-is-infinite