Here is the full list of all 16 Universe Sandbox achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Some will know from their childhood; some were not born yet
Freeze the Earth by moving it farther from the Sun
Crash the Earth into the Sun
Capture 100 screenshots
Start Universe Sandbox 10^1 = 10 times
Rule over your universe for 60 minutes
Finish five tutorials
Rule over your universe for 60 seconds
Start Universe Sandbox at least once
Start Universe Sandbox 10^2 = 100 times
Start Universe Sandbox 10^3 = 1000 times
Start Universe Sandbox 10^4 = 10000 times
Rule over your universe for 24 hours
Rule over your universe for 30.4 days
Rule over your universe for 12 months
Result of millions of years of computation