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What is the order from largest to smallest: galaxy, universe, star, asteroids, planets, moons, solar system?
The Size of the Universe: The universe is vast, measuring approximately 93 billion light years in the size of. This is because the Earth can be described as an individual, tiny planet within the vastness of space. To put this into perspective when we shrink the universe to the point that Earth and the Sun were only one inch apart, the nearest star would be around 4-miles away.
Answer: They range in size from the largest to the smallest: Universe, galaxy, solar system, star, planet, moon and asteroid.
Let’s take a look at them, starting from the smallest to the largest. The size order is not perfect because there are exceptions.
Asteroid is a rock body that lies between Mars and Jupiter in the asteroid belt. These small objects are common. The largest asteroid Ceres was reclassified as dwarf planet.
A moon is a rocky body orbiting around a planet. Some moons, such as our Moon, are larger than an asteroid and can be quite large. Some moons are smaller than others.
A planet is a near-spherical body that orbits around the Sun. The planets are bigger than the moons.
The star is the center of all planets. It is the main source of heat and light. The Sun is a star that is much larger than any of the other planets.
The solar system includes a star, all its planets, asteroids and comets. It is much larger than a star.
A galaxy is a group of solar systems that orbit around a central center. The centres of most galaxies contain a supermassive dark hole.
Clusters of galaxies also form large-scale structures.
Everything is in the universe. It is home to billions upon billions of galaxies.