Almost 20 years have passed since Cassini was launched, and the spacecraft is making its grand finale. The mission will end with Cassini entering into Saturn's atmosphere on September 15, 2017, destroying itself for good. Over the years, Cassini has produced a ton of absolutely stunning photos of Saturn and its many moons. So in honor of the spacecraft, let's take a look back at some of its best.
And now it's time to test your knowledge.
Even though these images have given us a lot of information, humans actually don't know much about outer space. For example, is there life out there? Who knows! But we do know a few things, and this quiz is going to reveal just how much you know about our solar system and beyond.
Quick, fill in the blank: "_____, I am your father."
If you said "Luke," you might not be a true "Star Wars" fan, or you're experiencing the Mandela Effect. Darth Vader's frequently misquoted line is actually, "No, I am your father."
But if you did get this one right, don't get too cocky. It's one of the most famous lines in the series, so we're not that impressed with you... yet. If you really want to cement your status as a serious "Star Wars" fan, you're going to have to ace this quiz.