I really enjoyed NEO Scavenger and I'm quite looking forward to playing Ostranauts :-) From what I saw on your Youtube-Channel, the game looks really promising. There's just a little something that I might not have understood by now:
You've said that you didn't want to use artificial gravity in your game because you preferred to stick to less Sci-Fi physics. But given the artwork that you revealed so far, your ship-design with sofas, tables, and ashtrays relies on gravity for things to stay where they belong. You wanted to solve this by constantly accelerating your ships if I understood that correctly.
If I got that right, wouldn't that lead to some logical problems itself? For example, the amount of fuel you would need to travel would need to be extremely huge, because you cannot have any phases with constant traveling speed (that doesn't need much fuel because the ship just keeps its momentum). You need to constantly fire your main engine to keep up gravity, either accelerating or deaccelerating for the whole trip. Plus, you need to change from acceleration to deacceleration at some point. On that point, you would need to flip the ship around, so you can deaccelerate using the main engine. And at least when you do that, you would have a short phase without gravity.
Since I infer from the looks of the gameplay that you are probably aware of this, how do you solve it? I'm just curious :-)