The Hellas basin is the circle surrounded by dark bits (Destiny)

by Funkmon , Monday, April 23, 2018, 14:30 (2350 days ago) @ Morpheus

It's one of the biggest impact craters we know of.

Another big one is Caloris basin on Mercury, which we also visit in the game.

There's some weird geology going on in this spot, but expect nothing to come of it. I bet they picked it because it's a big spot that's easy to identify with a telescope. (Bright thing opposite the 90 degree angle of the two dark spurs from the dark part)