system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] The best minds on Earth use every resource available to build the most advanced spaceship they can. How does it rate on the intergalactic scale?

The Iron Man suit is basically a cute toy compared to the tech Rocket Raccoon is familiar with, but that's just the work of one dude using the materials he can get (which is admittedly a lot).

So let's say that Tony Stark, Shuri, Bruce Banner, Hank Pym, Peter Parker, even Doctor Strange all come together and pool their knowledge of arc reactors, vibranium, Pym particles, Dr. Cho's flesh-printing machine, spider silk and freaking magic and use all of this (plus whatever else you can think of, as long as it's found on Earth) to build the most technologically advanced spaceship that MCU Earth is capable of. What do various aliens, like Rocket and the Kree and Asgardians et al., think of the result? Would they be impressed? Laughing at it? Somewhere in between?

(No Infinity Stones or Asgardian tech are available for this hypothetical, but they do know about them and can draw inspiration).
gpt
Well, Tony invented a space-time GPS that can hop anywhere in time and space by navigating the quantum realm..so along with Hank and his Pym particles, the Wakandan's ship design and vibranium, they should eventually have an interstellar vessel that can travel to anywhere in the universe almost instantaneously. The Rhody/Nebula/Widow/Hawkeye team traveled to Morag, a planet in the Andromeda Galaxy in seconds.
Where they might be lacking is artificial gravity...perhaps a spell from Strange is possible.