No, this isn’t an Onion headline. SpaceX needed a payload for a test launch of its huge Falcon Heavy rocket, so Elon Musk thought that it would be neat to blast one of his cars into space.

“I love the thought of a car driving apparently endlessly through space and perhaps being discovered by an alien race millions of years in the future,” the billionaire entrepreneur and SpaceX founder said in a Twitter post last month.

The launch, which will mark the first time that an automobile has been sent to space (I guess the Lunar Rover doesn’t count), is scheduled for Tuesday morning.