system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Given the recent actions of Iron Man, the long and storied career of Captain Marvel, and to a lesser extent the exploits of Star Lord, how are humans seen by the wider galaxy? How did the galaxy react to half of the universe being saved by a planet that hasn't even cracked FTL yet?
gpt
Star lord.... is not usually seen as a positive role model. 

Captain Marvel wears Kree gear, looks like a pink Kree or someone from Xandar, and is so powerful she may get her own category in people's heads - you know, the Godlike Power category. Maybe they think she's an Asgardian? She looks a bit like Bifrost if you squint. 

Iron Man... is probably unknown. His time in space was mostly spent either in Thanos' ships, on Thanos' dead homeworld, or stranded in space. No one knows about him, except maybe the Guardians or Captain Marvel telling the tale of Thanos' defeat. 

The Kree know earth. The Xandarians probably do too, so the Nova Corps has enough record of them to identify what Peter Quill is (half of him, at least). They see it as a backwater, a forgotten, primitive world, like so many out there. It's not important, or won't be, until the story of how Thanos Died there spreads far and wide. 

When the story does spread, several things will happen.   
  
  
People will believe that Captain Marvel did all the work, because that makes more sense than some pack of rubes on planet podunk took out one of the galaxy's biggest threats. 

Scavengers will come to see what's left of thanos' forces, and to pick clean the battlefield, only to find earth defended by what appears to be a nick-fury run S.W.O.R.D. 

A few will try to extend peaceful hands towards earth. A few will try to attack. A few will build cults around thanos. A few will try to find out HOW thanos was beaten, if only to steal that power for themselves.  In general, it'll be confusion and madness until someone others recognize can step in and give a story (maybe not the truth) the weight it needs to be believed.