The Universe is everything we can touch, feel, sense, measure or detect. It includes living things, planets, stars, galaxies, dust clouds, light, and even time. ... The Universe contains billions of galaxies, each containing millions or even trillio...
There are at least 175 moons orbiting the planets and dwarf planets in the Solar System. Some of these moons are pock-marked with crater, while others are covered in ice. They range in size from tiny Phobos to gigantic Ganymede.