Did you know that the Sun is so big that over a million Earths could fit inside it? It makes up 99.8% of the total mass of our solar system! Black holes are one of the most mysterious phenomena in the universe. They are regions in space where gravity is so strong that nothing, not even light, can escape its pull. The largest volcano in our solar system is not on Earth, but on Mars. Olympus Mons, a massive shield volcano, stands at a towering height of 13.6 miles, making it almost three times taller than Mount Everest. There are more stars in the universe than grains of sand on all the beaches on Earth. With an estimated 100 billion galaxies, each containing billions of stars, the vastness of the universe is truly mind-boggling. The temperature on Venus can reach a scorching 900 degrees Fahrenheit, making it the hottest planet in our solar system. It has a thick atmosphere that traps heat, creating a runaway greenhouse effect. Neptune, the eighth planet from the Sun, has winds that can reach speeds of up to 1,200 miles per hour, making them the fastest in the solar system. Its atmosphere is composed mainly of hydrogen, helium, and methane. Meteors, also known as shooting stars, are pieces of rock and metal that burn up as they enter Earth's atmosphere, creating a bright streak of light in the sky. On a clear night, you may be lucky enough to see one!