From nano satellites in space.

According to the project document, SpaceCoin will introduce a new design based on a layer-one blockchain network operating in outer space and layer-two networks on Earth.

The first layer outside Earth is known as the Celestial Chain, while the second layer on Earth is known as the Uncelestial Network.

“The Celestial Chain is the ultimate external authority,” Malchi commented. “After all, it is the one that records an unchangeable history that may outlast our lives here on Earth.”