https://techcrunch.com/2019/10/22/elon-musk-tweets-using-spacexs-starlink-satellite-internet/

SpaceX CEO Elon Musk used an internet connection provided by his company’s Starlink constellation of broadband satellites early on Tuesday AM. Musk used the network in place with the Starlink satellites already in orbit to send a simple tweet, declaring that he’d done just that.

Sending this tweet through space via Starlink satellite ?