Explain with a diagram why we see the Milky Way as a broad band of stars stretching across the sky from one horizon to another.
So, I'm not sure what to draw...
is it right to draw milky way then there is other galaxies in the background????
Aren't we in the plane of the Milky Way Galaxy?
To explain why we see the Milky Way as a broad band of stars stretching across the sky, we need to understand the structure of our galaxy, the Milky Way itself. Visualizing this can be a bit complex, but I'll do my best to explain it to you without a diagram.
Imagine that you are inside a large circular room, and the walls of the room are made up of countless small lights. These lights represent the stars in our galaxy. The circular room represents the disk-shaped structure of the Milky Way, with us being located somewhere inside it.
Now, envision yourself looking toward the center of the room. At the center, there is a bright, dense cluster of lights representing the bulge of the Milky Way, which contains older stars. As you move your gaze away from the center, towards the edge of the room, the lights become less concentrated and spread out. This area with more dispersed lights represents the outer regions of the galaxy where younger stars are located.
In reality, we are not inside a circular room, but rather inside the disk-shaped structure of the Milky Way. Therefore, when we look up at the night sky, we see the dense band of stars stretching across the sky. This band is the disk of our galaxy as it appears from Earth. Since we are situated within the disk, we see the band of stars broadening across the sky from one horizon to another.
While it is true that there are other galaxies in the universe, they are not typically visible to the naked eye as individual galaxies when you look at the night sky. The Milky Way itself contains billions of stars, and what we see as the "Milky Way" is composed of the combined light of all those stars in our galaxy. So, drawing other galaxies in the background wouldn't accurately represent why we see the Milky Way as a broad band of stars across our sky.