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Not only that, it's being set into orbit around the sun.

Yep, and not just for kicks, it's also to demonstrate they can launch a payload far enough to reach the orbit of Mars if required.

I understand now. Is because of vogons that we need to colonize Mars.

That's great. Where did you find this info on the payload?

Initially from Musk's Twitter feed, but there's now also a Wikipedia entry about the car: https://en.wikipedia.org/wiki/Elon_Musk's_Tesla_Roadster

There's also an artists rendition of the launch and payload on spacex's YouTube channel (titled: Falcon Heavy Animation)