"List of artificial objects on the Moon"
https://en.wikipedia.org/wiki/List_of_artificial_objects_on_...
It's a lot more than you might think, and I couldn't find a comprehensive list of the non-spacecraft objects, some of which are hinted at in the first paragraph.
Curious to see if to what intensity the Moon will "ring like a bell" at this one.
ref: https://books.google.ie/books?id=6QAAAAAAMBAJ&pg=PA56&lpg=PA...
What I think is very ironic is that Blue Origin actually beat SpaceX to Mars, after a decade of SpaceX "make life multiplanetary". A few months after Blue Origin did that SpaceX announced now they'll just go to the Moon, no more Mars.
https://www.nasa.gov/news-release/nasa-blue-origin-launch-tw...
inb4 wreckage on the moon that stays there forever
Several times the speed of sound? That is meaningless when there is no media for the sound waves. I think a better unit might be furlongs per fortnight.
I cannot wait for Starship to become a real thing, but you have to admit it's way behind schedule. The engines are awesome now.