Learn about the difference between a galaxy, a vast collection of stars, gas, and dust bound together by gravity, and a solar system, a star and its orbiting planets and objects.
Galaxies and solar systems are two distinct astronomical entities that differ in scale and composition. Here are the key differences between a galaxy and a solar system:
A galaxy is a massive collection of stars, planets, gas, dust, and other celestial objects that are bound together by gravity. Galaxies can contain billions to trillions of stars and can span thousands to millions of light-years in size. The Milky Way, our home galaxy, is just one of billions of galaxies in the universe.
Galaxies are typically classified into different types based on their shape, such as spiral, elliptical, or irregular galaxies. They are dynamic systems with diverse populations of stars and are the building blocks of the universe.
A solar system, on the other hand, refers to a specific planetary system that includes a central star (such as our Sun) orbited by planets, moons, asteroids, comets, and other celestial bodies. Our solar system is just one among many in the Milky Way galaxy.
Solar systems are much smaller in scale compared to galaxies, typically spanning a few dozen astronomical units (AU) from the central star. They are governed by the gravity of the central star and follow predictable orbits around it.
Overall, galaxies are vast systems of stars and other objects, while solar systems are smaller planetary systems within galaxies.
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