Following the epic Avengers: Endgame trailer, NASA offered Marvel Studios advice on how to bring Robert Downey Jr.'s Tony Stark back to Earth from the depths of space. Marvel, in return, acknowledged the space organization for its assistance. Now, the man responsible for the back-and-forth has thanked NASA for joining the rescue effort.Downey Jr. tweeted, "Always good to know @NASA has your back" -- succinctly summing up what all fans, as well as Marvel Studios, have been thinking as we all try to figure out how Iron Man will make his way back to Earth from Titan.RELATED: Avengers: Endgame: NASA Responds to Tony Stark's Call for HelpAll we know so far is Tony is short on oxygen, water and food. If he's to come back home and reunite with the Avengers to undo what Thanos did with his famous snap (aka the "Decimation"), he's simply running out of time.

If any group knows how to get people back home from the cosmos, it's NASA. Hopefully, some detailed advice is sent to bring Stark in from the mysterious part of the galaxy he's marooned in. Because let's face it, he'll be needed for whatever Chris Evans' Steve Rogers and the remaining Avengers have planned when they take on the Mad Titan once more.

RELATED: Marvel Responds to NASA's Advice on How to Rescue Tony Stark

Avengers: Endgame will release on April 26, 2019. Directed by Joe and Anthony Russo, Marvel’s Avengers 4 stars Robert Downey Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Sebastian Stan, Benedict Cumberbatch, Paul Bettany, Samuel L. Jackson, Cobie Smulders, Benedict Wong, Zoe Saldana, Karen Gillan, Vin Diesel, Dave Bautista, Pom Klementieff, Scarlett Johansson, Tom Holland and Anthony Mackie.