More ideas from S
The Grand Circle..     Just as every point along the equator is 6,215 miles from both the North and South Poles, every point along this circle of ancient sites is 6,215 miles from two axis points on Earth...

The Grand Circle. Just as every point along the equator is miles from both the North and South Poles, every point along this circle of ancient sites is miles from two axis points on Earth.

senior-crown:beautiful-lines-321:I wonder if the tires looked like that after each landing?I don’t think they lasted very long (I thought I read they were replaced after every 10 landings, but I could be wrong), but they were pressurized with nitrogen.

wonder if the tires looked like that after each landing?I don’t think they lasted very long (I thought I read they were replaced after every 10 landings, but I could be wrong), but they were pressurized with nitrogen.