The question of what lies beyond the observable universe or what might be on the other side of Earth's galaxy is still a subject of scientific speculation and exploration. Here's what we currently understand based on our scientific knowledge:
Beyond the observable universe: The observable universe is the portion of the universe that we can see and study due to the limitations of the speed of light and the age of the universe. It extends about 93 billion light-years in diameter. However, the universe is believed to be much larger than what we can observe. The exact nature of what lies beyond the observable universe is still unknown. It could extend infinitely, or it could have a different structure or properties that we are yet to understand.
Beyond Earth's galaxy (the Milky Way): If we were to travel beyond our galaxy, the Milky Way, we would encounter other galaxies. The universe is filled with billions or even trillions of galaxies, each containing billions of stars. As we ventured farther into space, we would encounter different types of galaxies, such as spiral galaxies, elliptical galaxies, or irregular galaxies. The distribution of galaxies in the universe is not uniform, and they are organized into vast cosmic structures like clusters, superclusters, and filaments.
The large-scale structure of the universe: On the largest scales, the universe appears to be structured into an interconnected cosmic web. Galaxies and galaxy clusters are not randomly distributed but form patterns and filaments that stretch across vast distances. These structures arise from the gravitational interactions between matter and dark matter. Exploring the large-scale structure of the universe would involve studying these cosmic structures and understanding their formation and evolution.
It's important to note that venturing into space forever would require technologies far beyond our current capabilities, as the vastness of the universe makes long-distance space travel immensely challenging. Additionally, the speculative nature of what lies beyond our observable universe means that many aspects of the cosmos beyond our current understanding are still open to exploration and scientific inquiry.