Hi....
Something interresting for Alien fans ..
Ever heard of celestia
, It's a space simulation software like google earth... what let's you discover space..it has 125.000 stars , nebulairs and multiple other things to discover...
Now the Interresting thing...
First goto :
http://www.shatters.net/celestia/ download and install celestia...
after that goto...
http://www.celestiamotherlode.net/catalog/fictional.php#1800 and choose second of top "Alien Universe "and install it into celestia...
It's the Alien planet complete with LV- 426 and nostromo , narcissius and sulaco orbiting it...
there is a lot of fan made sci - fi add ons on that last link..
have fun