1 0:00:00.120 --> 0:00:04.150 [music] 2 0:00:04.170 --> 0:00:08.210 So one of the unique challenges of the OSIRIS-REx mission is the microgravity 3 0:00:08.230 --> 0:00:12.270 environment that we're going to, which is very different from us than orbiting a planet as we're used to. 4 0:00:12.290 --> 0:00:16.490 Without the large gravity of a planet, the navigation uncertainties affect 5 0:00:16.510 --> 0:00:20.690 us a lot more. And the non-gravitational forces on the spacecraft affect our 6 0:00:20.710 --> 0:00:24.770 trajectory in ways that make it much more dynamic from a power and thermal point of view 7 0:00:24.790 --> 0:00:28.960 on the spacecraft. We're also working on a much shorter turnaround times since our 8 0:00:28.980 --> 0:00:33.090 optical navigation has to be downlinked every day and that drives a much faster turnaround times 9 0:00:33.110 --> 0:00:37.559 for us from a data and downlink point of view.