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