I've been exploring for now 2 weeks and have come to the conclusion that its not worth surface scanning ice planets, rocky planets or roid fields. I always scan the larger gas gaints as there can be signs of life (tends to be the big brown textured ones), high metal content planets (they are usually close to the sun and close together taking only minutes to scan), water worlds and of course earth like planets. If there is a second sun less than 150,000k and it has interesting looking planets I would take the trip. If the other suns planets are just ice or rock forget it, if they are high metal make the judgement if you want to spend 5-10minutes getting over there. Can be a good excuse to go get another drink, snacks etc. Most I have travelled is 300,000ls to check out what I thought was an earth like and turned out to be a high metal. Guess I need higher resolution graphics or better eyes.