@RebeccaJeanine71 So you cannot find the saucer that abducts random sims in the buy DEBUG mode. It's not available (like cars). Butttttt you can purchase a satellite. You will need to do bb.showhiddenobjects and bb.ignoregameplayunlocksentitlement. Type in satellite and it won't be the spy satellite but the other one (Satellite Dish I think), the tall one on the stick. Put it on the roof or the ground. In live mode, click it. There will be an option to "Contact Aliens." This should bring the aliens around for an "invasion." Then within 24-48 sim hours between the sim hours of 8pm and 2 am, alien abductions are possible and you could take some nice shots of the ship.
I have two suggestions. Do this on Sixam. To get to Sixam. Have your sim join the scientist career (temporary). Level them up to 10. bb.showhiddenobjects and bb.ignoregameplayunlocksentitlement. Find the "Electroflux Wormhole Generator" Then find the "Invention Constructor". In live mode, drag the portal into the invention constructor, click on it and have your maxed level sim upgrade it (This is why you need a high level Scientist). When they are done, move the portal out of the invention constructor, test the portal, and then walk through it. BAm you're on Sixam! And you can invite anyone you want to Sixam.
I also suggest building an alien ship on sixam or using one from the gallery (Alien ship by mamamazare is gorgeous). Also place the satellite dish. Contact the aliens there. And you should get at first an alien "invasion" and then within 24-48 hours between the sim hours of 8 pm and 2 am abductions will be possible even though you are on Sixam. (Weird, yes, but also totally cool. The Forgotten Grotto and Sylvan Glade also allow alien abductions. And the Forgotten Grotto might be really really cool because it's in the middle of a desert.
Hope this helps and happy simming!