Four Spiral Arms Walk into a Bar…
7 Apr 2021, 11:00 UTC
NASA/JPL-Caltech/ESO/R. Hurt
The Milky Way Galaxy is our home, and yet we don’t have a very clear picture of how it is structured. We know that we live inside a barred spiral galaxy, but how many spiral arms does our Galaxy have? Where are they located? How tightly are they wound?
