Why do you have a ballistics textbook? Also, that's pretty interesting.
The short answer is doing research for a book I am writing.
Yeah, I thought it was pretty interesting too. I never really thought much about space travel but I remembered the book also covered trajectory in vacuum so I took a look.
no subject
The short answer is doing research for a book I am writing.
Yeah, I thought it was pretty interesting too. I never really thought much about space travel but I remembered the book also covered trajectory in vacuum so I took a look.