cheers for the info, what is considered a precious find??
It depends what you mean by precious. If you're exploring for money, water worlds, Earth worlds and terraformables are valuable. If you're doing it for pretty views, a precious one would be a very pretty view. If you're doing it for fame, it would be finding something that nobody else found, like aliens, alien structures or something like that.
Some people like to tick off lists. I can remember the Observers Books, like The Obsservers Book of Moths. You had to go out and find all the different moths that were described in the book. I think you could get a badge or something if you sent your book off with everything ticked off. Basically, it was an exploration hobby. They had The Observers Book of Trains, Fish, Insects, Fungi, Astronomy and just about everything. You can do the same in ED if you look in your Codex discoveries, which is in the first tab of the left panel. It's basically, the Observers Book of Things in the ED Galaxy. The Galaxy is divide up into sectors. In each sector, you get the chance to find all the different things again so that you can tick them off again. Getting that last square filled would be very precious.