Fun fact (By Google don't hate):The universe includes all existing matter, energy, space, and time, spanning billions of galaxies. While planets, stars, and gas make up visible matter, they represent less than 5% of the total, with the rest being mysterious dark matter (27%) and dark energy (68%). It is expanding, began ~13.8 billion years ago, and includes black holes, nebula, and cosmic radiation. Components of the Universe Normal (Visible) Matter (<5%): Everything we can see and touch, including planets, stars, moons, asteroids, comets, gas clouds, dust, and living organisms. Dark Matter (~27%): Invisible substance that does not emit light, known only by its gravitational effects holding galaxies together. Dark Energy (~68%): A mysterious force driving the accelerated expansion of the universe. Key Structures and Objects Galaxies: Massive systems containing millions to trillions of stars, gas, dust, and black holes. Stars and Solar Systems: Stars produce light and heat; they are orbited by planets, dwarf planets, moons, and debris. Nebulae: Vast clouds of dust and gas where new stars are born. Black Holes: Regions with gravity so intense that nothing, not even light, can escape. Large-Scale Structures: Galaxies group into clusters and superclusters, separated by massive empty voids. The observable universe is only a portion of the entire cosmos, which may extend far beyond what we can detect.