Inspired by lovely sketches by astronomer Mary McIntyre, I decided to see whether I could also see the movement of the Moon’s terminator over just a few hours.

I set up two waning gibbous moon missions, just over four hours apart on Slooh Australia One.

I had read that “careful observers” would maybe be able to see the 15.4 km per hour (9.6 mph) movement of the terminator (as at the Moon’s equator)

Apparently top class human athletes would be able to keep up with the terminator!

If you look carefully towards the terminator where I have labelled craters, you may also spot the differences as the Moon waned from 14:00 – 18:30utc.