OUR GALAXY

A galaxy contains stars,gas,and dust held together by gravity.There are millions of stars, in the galaxy.There are millions of galaxies in the universe.The distance across galaxies is many light-years.A light year i the distance light travels in one year: it is 9,5trillion kilometres. Galaxies are labelled according to their shape:
-spiral the milky way.
Our galaxy is called the milky way. Ancient Greeks said it·,s spiral shape was a“river of milk”.Ancient Romans called it the Via lactea or “road of milk”