Here’s a quick sketch of Ellie’s Orbital Platform, or O.P. for short. But the crew here at Mission Control just call our bus-sized satellite Opie. He doesn’t say much, but he’s got the important job of relaying signals back and forth between Ellie and Earth, as well as forecasting weather, guiding Ellie on the safest path (though she doesn’t always take it), and taking fantastic high detail photos of the planet’s surface. You can see him represented in the Mission Control hologram map of Planet X in this pic here.