You can use cheat.
boolProp TestingCheatsEnabled true
Then hold shift button, then clisk the telescope. There's menu DEBUG - Get Abducted or something what, click it, they, your sim will stargaze, and abducted immediately.
Some people said that cheat could harm your computer. So be careful when using this cheat, and turn off after you use it. I don't know, because in my computer there's nothing happen after i use that cheat.
For further information, you can open www.snootysims.com