Why Galaxy Is Flat And Planets Not?

Space is vast and has so many secrets to share with us. If we think of any planet, the first image that comes to mind is that of a round object. It can be different in color or surrounded by cloud bands, but still round. But when we think of galaxies, we imagine a thin glittering streak across the sky. Why is it so? Can galaxies be anything other than flat? Learn more about your ad choices. Visit megaphone.fm/adchoices