Here is the full list of all 11 Observation achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Found the alternate Emma on the alternate station
Reached the Rescue Station
Gained access to Universal
Reached Saturn, somehow
Broke the first law
Investigated the jettisoned module EAS-12
Remarked on your effigy
Found Emma's last message in her bunk.
All the worlds are yours...
Recovered and/or combined all Data Drops
Brought the new gift home...