Commander Terry Virts, an astronaut whos currently in space working at the International Space Station, just got a message from his daughter.

But the message Steph s you! wasnt written by hand or typed in an email. It was etched in the sand down on Earth by a fleet of Hyundai cars.

The message, which was written in the sand at the Delamar Dry Lake in Nevada, was large enough so that it could be viewed from space.

Watch Virt's daughter, Stephanie, make the message in this video, which has garnered more than 9 million views.