How many miles is it to cross the entire globe in a straight line?
How many miles is it to cross the entire globe in a straight line?
user
I don’t understand the question.  Can you clarify?
assistant
If I wanted to go across the whole world in a straight line in an airplane how far is it?
user
This is a pretty difficult question for me to answer.  But let’s say you want to fly directly across the Earth.  This is called a “great circle,” and they’re the longest distance you can travel on the Earth’s surface, assuming you don’t account for small changes in elevation or hills or other structures.  The shortest distance between two points, if you account for these changes, is called a “geodesic.”
assistant
How big is the Earth?
user
The Earth is the largest planet in our solar system, with a diameter of about 12,000 miles.  That’s not counting the moon and the planets, though.
assistant
I don't understand.
user