The Universe, also called Cosmos, includes absolutely everything we know, without exceptions. Matter, energy, space, and time, everything that exists in our lives is part of our Universe.
The Universe we know is filled with stars, planets, groups of planets, galaxies, clusters of galaxies, and much larger structures called superclusters, as well as suspended matter called intergalactic matter. Its size is still unknown, and there are also many theories about this issue.
Despite the tremendous technological advances available today, many questions about the Universe remain unanswered.
