Here is the full list of all 15 helionaut achievements.
Fix the TV.
Destroy the Robot HQ.
Find the Robot HQ.
Fix the radio.
Fix the ship blaster.
Fix the radar.
Fix the hyper drive.
Fix the ship.
Discover 50 planets.
Clear an Astro Base.
Find all blueprints.
Find and fix all ship parts.
Fully upgrade all ship parts.
Craft all pilot upgrades.
Reach 100% on a savefile.