Science
What is a galaxy? – ScienceNordic
What are they made of and how many different types are there? Astrophysicist Peter Laursen explains.

Gazing at the dark night sky, you see stars scattered in all directions. There might be a few more here than there are there, but in general, the stars are distributed more or less evenly on the night sky.
However, if you find yourself in a particularly dark spot, you’ll see a faint band of light across the sky. And if you were to point a telescope in the direction of this band, you’d see many many more stars.
Italian scientist Galileo Galilei was the first one to do this, thereby confirming the…
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