BigChiliVerde t1_j1o1179 wrote on December 26, 2022 at 12:11 AM Reply to Determining the shape of Milky Way by omg-whats-this The 21cm emission line of neutral hydrogen was used to map the interstellar hydrogen gas clouds in the early 1950's. This gave us the first detailed images of the spiral structure of the Milky Way. Permalink 9
BigChiliVerde t1_j1o1179 wrote
Reply to Determining the shape of Milky Way by omg-whats-this
The 21cm emission line of neutral hydrogen was used to map the interstellar hydrogen gas clouds in the early 1950's. This gave us the first detailed images of the spiral structure of the Milky Way.