I don’t find it surprising at all that we found traveling through a vacuum easier than traveling through solid granite. Imagine how much mass that drillbit had

I don’t find it surprising at all that we found traveling through a vacuum easier than traveling through solid granite. Imagine how much mass that drillbit had to go through and now translate that into the density of interstellar medium. You could probably travel half way across the galaxy before your space ship went through as much matter as that drill.