Sun light. This photo looks like it was taken at dusk or dawn and it's dark enough to see the far side/day side of earth reflecting more than the night side. It's not as noticeable for us with Venus because it's closer ie brighter and more reflective due to the atmosphere making it visibly white.

They're mucking it about a little though, like that post when checking if types don't match '! value is type' can now be 'value is not type' which is more readable but not as logical in terms of the language.

For guitarists definitely 'wooden heads' cus different woods are their outlet.

But they're almost all 'iums', changing just one is like finding a fly in a bowl of cereal