On February 3, 2006, astronauts at the International Space Station sent an empty spacesuit tumbling through space all by itself … for science. [‘On This Day in Space’ Video Series on Space.com](https://www.space.com/39251-on-this-day-in-space.html) Known as SuitSat, this empty spacesuit was equipped with a radio transmitter that would constantly broadcast pre-recorded messages from scientists and students from around the world. It also broadcasted telemetry data, so amateur radio operators and citizen scientists on Earth could participate in tracking this creepy satellite. SuitSat only made it around the Earth twice before its batteries died prematurely, and it burned up while reentering Earth’s atmosphere a few months later.