In Guardians of the Galaxy and Vol. 2, we run into several humans who seem to have been in space for quite a while, prior to the events of the Infinity Saga (i.e. before 1995).
We know how Peter Quill ended up in space. But there is also Stakar Ogord and Aleta Ogord, who as far as I can tell are humans, and also seem to have been in space for quite a while. Moreover, most aliens seem to be familiar with humans, even though according to the main storyline, very few humans had left the solar system or had contact with extraterrestrials prior to the events of The Avengers (2012).
Have there always been "older" space faring humans in the MCU?