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Exploring Galaxies: Shapes, Sizes, and Cosmic Mysteries

All galaxies are made up of stars, gases, and dust. There are billions of galaxies across space, including the one Earth is in: the Milky Way.

There are so many galaxies that scientists cannot keep track of all of them; however, it is known that they all have solar systems. A solar system is just a speck of the whole galaxy. The Milky Way’s solar system has eight planets.

There are various types of galaxies, such as spiral, elliptical, and irregular galaxies. Spiral galaxies look similar to pinwheels. Sixty percent of the closest galaxies to the Milky Way are spiral galaxies. Also, they are often the brightest in the universe.

Elliptical galaxies are shaped like flat ovals and circles. They are not as bright as other galaxies because they mostly contain older stars and very little dust and gas. Although they are the most giant galaxies, they make up 20% of nearby galaxies.

The third type of galaxy is the irregular galaxy. No irregular galaxies can take the same shape. Although they are among the smallest galaxies scientists have observed, they can be very bright. Irregular galaxies comprise the same things as other galaxies and 20% of nearby galaxies.

Quasars are energy that forms in the center of a galaxy, but not all galaxies have them. They are some of the brightest objects in the universe. They are primarily black holes. There is a black hole in the middle of the Milky Way, but in this case, it’s not a quasar because it is too small.

Galaxies can be many shapes, including squares, circles, rectangles, etc. Galaxies are mysterious, and there is much more to learn about them and space.

[Sources: NASA; Space Place]

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