Requires Windows, Mac, or Linux
If you place an object at 1.00 lightyears and another at -1.00 then you could find the distance as to 2.00 ly.Click on an object and click on the third tab.
No easy way to measure distances in the current release. I hope to address this problem in a future update.If you right click on a body it will show you the distance from its 'parent' object and from your current position.