Galaxies are massive collection of stars, gas, dust, and dark matter held together by gravity. They are like a giant city of stars floating in space. They are constantly changing, growing and evolving.
Milky Way Galaxy is where our solar system, including Earth, resides among billions of other stars. It is 100,000 light-years across, which means if you travelled at the speed of light, it would take you 100,000 years to cross the Milky Way!
The Milky Way galaxy is called "Milky Way" because of its appearance as a faint, milky band of light stretching across the night sky. This band of light is caused by the combined glow of countless stars, nebulae, and other celestial objects within the galaxy itself.
Galaxies come in various shapes and sizes. Some are spiral-shaped like our Milky Way, others are elliptical or irregular. Additionally, Galaxies can collide and merge with each other over millions of years, creating new structures in the universe.
Some scientists believe that there may be billions of Galaxies in the universe.
The closest Galaxy to our Milky Way is the Andromeda Galaxy, also known as M31. It is about 2.5 million light-years away from us and is on a collision course with the Milky Way, although this collision won't occur for about 4 billion years.
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