The nature that surrounds us invariably includes a fantastic picture of the starry sky, which is crossed by the luminous strip of the Milky Way. People compared it to spilled salt or spilled milk. And only the advent of the telescope confirmed the ancient guess - this is a huge cluster of stars, which we call the Galaxy.
What is the Galaxy? What objects are included in its composition (what is its population), what are its sizes? Man gradually learned more and more about how our stellar home, the Milky Way Galaxy, is structured.