The Benatar's Space Pod is an auxiliary vehicle attached to the Benatar M-class spaceship used by the Guardians of the Galaxy. It was used to transport Rocket Raccoon, Groot, and Thor to Nidavellir to forge Stormbreaker.
When the Statesman fell under attack from Thanos, the Asgardians broadcasted a distress signal, received by the Guardians of the Galaxy. However, they had arrived too late to prevent Thanos from destroying the refugee ship, but were able to recover Thor and brought him aboard the Benatar. After they had compared notes on Thanos and the Infinity Stones, the Guardians and Thor agreed to split up, with Rocket Raccoon and Groot accompanying Thor and took the pod to Nidavellir so as to forge a "Thanos-killing" weapon, while the rest of the Guardians traveled to Knowhere so they could prevent Thanos from claiming the Reality Stone.
When the trio arrived at Nidavellir, they found it in a state of disrepair with Eitri explaining that Thanos had forced the Dwarves to forge him an Infinity Gauntlet before he'd killed them all and crippled Eitri. Though Eitri could direct them in forging Stormbreaker, such an act would require the dwarf star to be open once again. Thus, Thor elected to pull the station's rings himself and attached a cable to the pod. Rocket Raccoon expressed skepticism that Thor could move such gigantic rings by himself, only for the God of Thunder to suddenly swing him and the pod around before launching them all towards the furthest ring. Thor acted like an anchor as the pod pulled the rings into alignment, reawakening the star.
Thor got on top of the pod, proudly boasting to Rocket of the true majesty of Nidavellir. Subsequently, Thor leaped off the pod to hold open the star's iris long enough for the Uru to melt into place. Unfortunately, Thor sustained mortal injuries from the solar radiation and was thrown towards the forge. Rocket piloted the pod in pursuit but wasn't able to catch him in time and landed back inside the station, where Stormbreaker revived Thor. The pod was subsequently left behind on Nidavellir as Thor, Rocket and Groot used the Bifrost to transport directly to Wakanda and join the fight against the Black Order.