Update 0.12 is now available as an opt-in Beta. Assuming no major problems, that version will become the default branch next week. To opt-in now, you just need to right-click on the game in your library, choose properties and go to the Betas tab. There is no password. Click here to see detailed instructions. If you're playing 0.10.3 (the current default build) there are quite a few changes. Non-spoiler list of the major changes since 0.10.3:

• Universe is now generated with a hybrid procedural/designed system. Some sectors are procedurally generated, some are designed, some are a combination.
• Bigger universe. There are now close to 100 star systems with over 300 planets, over half of which have some kind of anomaly or discovery.
• 130+ unique planetary anomalies/scan discoveries.
• New technologies.
• New weapons.
• New missions/side-quests.
• New achievements.
• Updated trade system.
• Experimental difficulty settings.
• Improved controller support.
• Players can now leave notes on the map by right-clicking.
• Improvements to the mission log including search function.
• Updates to localization.
• Various balances changes.
• Misc. bug fixes.

• Fully open-world universe with numerous quests and storylines
  
• Hundreds of unique planet anomalies, space discoveries, artifacts and more!
  
• Fast-paced, exciting combat with numerous hostile factions
  
• Over 150 technologies to research
  
• Design your own ship using a modular construction system
  
• Talk and trade with multiple alien factions, each with their own agendas and dynamic AI
  
• Lots of hidden secrets and side quests
  
• Quick save anywhere
  
• Much, much more!

• OS: Ubuntu 16.04 LTS or SteamOS
• Processor: Intel Core i5 2.2 GHz+Memory: 4 GB RAM
• Memory: 4 GB RAM
• Graphics: 2GB OpenGL 3 Capable video card or better
• Storage: 2 GB available space

• OS: 4
• Processor: Intel Dual CoreMemory: 400 MB RAM
• Memory: 400 MB RAM
• Graphics: /
• Storage: 102 MB available space