[soarfourmore]

It's plausible. The moon's width is 2,158.8 miles, and I could imagine an explorer being >3000 miles from another human

[Igelau]

The actual travel distance would be further because you can't just bore through the moon.

[cbm-vic-20]

I'm too lazy to do the math, but what's the point-to-point distance (through the planet) of points that are 5000km along the surface?

[banana_giraffe]

Assuming a spherical earth, it's 4873 km.

[foobar1962]

Assuming a spherical earth in a vacuum... One of the few times that simplifying assumption matches reality.

[kelnos]

Not quite; the Earth is an oblate spheroid. Assuming it's a sphere is certainly a close enough approximation for this exercise, though.

[dylan604]

How far is it if you assume a flat earth?

[hulahoof]

5000km