Story mission and can't be missed.
After you finish Edgewater on Terra 2, Phineas will ask you to go to the Groundbreaker and talk to Gladys, who will sell you a navkey to Stellar Bay on Monarch. The navkey costs 10,000 bits. Once you buy it, you can give it to ADA and you will now be able to travel to Stellar Bay from your navigation terminal. Once you land there, the achievement pops.
If you don't have enough money, there's a few jobs to do around the Groundbreaker, but Gladys will also send you to Roseway on Terra 2 for a distress call. There's plenty of money to be made there.