Misc: What is the name of the background screen on which windows is displayed?

Questions

What is the name of the telescope that was placed in orbit in the eighties?

What computer game featured a disco leftover looking for love?

What was the inexpensive designer watch of choice amongst teenagers during the eighties?

Which rock group of the eighties gave away a silver keychain at every concert, which was supposed to bring good luck to whoever caught it?

Who was the lead singer of the Cure?