Here is the full list of all 45 Spacelines from the Far Out achievements.
Fly 350 passengers
Buy ship insurance for the first time
Clean a toilet or a puddle of puke 30 times
Reach planet Gambulon V
Reach the Vacation Sector for the first time
Have your flight attendant vomit
Nearly miss a comet
Fly 200 passengers
Unlock 3 ship blueprints
Fly a total of 20000 AU
Identify 1000 objects in space
Exceed your ship's maximum passenger capacity
Fly 100 passengers
Prepare 50 meals
Repair 100 broken systems
Reach the Gamma Sector for the first time
Unlock a ship blueprint
Unlock a customization
Explode your ship once
Get a 5-star rating for the first time
Acquire your first system upgrade
Unlock your first new employee
Customize your spaceline for the first time
Complete 5 routes while playing co-op (local or online)
Arrive at the Company Terminal
Nail 200 dance moves
Run out of fuel once
Complete your first route
Survive the tutorial
Acquire 30 system upgrades
Buy all 3 items at once at Droidley's
Fly a ship with all 15 classes of systems installed
Reach Gambulon V with a 5-star rating
Unlock 25 customizations
Unlock 50 customizations
Unlock 10 employees
Unlock 6 ship blueprints
Pass 5 health inspections
Get shut down by the health inspector
Run out of fuel 5 times
Explode your ship 5 times
Have 5 passengers simultaneously satisfied
Serve 200 meals
Heal 10 sick passengers
Unlock all achievements