Spacebit Satellite Client
Ever want to pay magic internet money to send HELLO WORLD to the entire world by bouncing it off a satellite? It's 2019 and this is a thing you can do. Bid testnet bitcoin using Lightning payments in order to send messages through a fleet of five Blockstream satellites that broadcast over pretty much the entire planet; anyone listening in with a satellite dish will get your message.
Sending a message with this service couldn't be easier, but verifying your message was sent requires tools that aren't as user-friendly.
Blockstream Satellite Client
Use this tool to pay for and broadcast messages
Node: ionosphere-testnet | 1ML - Lightning Network Search and Analysis Engine - Bitcoin testnet
This is the node that accepts testnet BTC payments for Spacebit

Receive Messages

Blockstream Satellite: Bitcoin blockchain broadcasts
Blockstream: Bitcoin and digital asset infrastructure
Use this tool to verify that your message has been broadcast
GitHub - Blockstream/satellite: Blockstream Satellite
Use these tools to receive messages sent by you and others, with or without a satellite dish
Once you've installed the Blockstream satellite Python utilities, run the following to receive messages sent over the satellite by connecting directly to a server, no satellite dish needed:
blockstream-satellite/api/examples$ ./
Then run the following to grab and save these messages:
blockstream-satellite/api/examples$ ./ --plaintext
Waiting for data...
[2019-02-04 23:22:42]: Got 2135 bytes Saving as plaintext
Saved in downloads/20190204232242.
[2019-02-05 02:57:25]: Got 1024 bytes Saving as plaintext
Saved in downloads/20190205025725.
Open the saved plaintext files to read the messages!
If messages are encrypted, the saved text will be unintelligible. Only unencrypted plaintext messages, like those sent via, will be readable!

Set up a Satellite Dish

Yes, this is a thing that you can do! Requires ~$200 worth of equipment and quite a bit of technical expertise.

Things People Have Sent

Somebody has been using the satellite to blog:
Pavol Rusnak, CTO of SatoshiLabs (creatos of the Trezor hardware wallet), even used the Blockstream satellites to relay the Lightning Torch:


Blockstream Satellites Now Cover Asia Pacific, Send Messages With Lightning - Bitcoin Magazine: Bitcoin News, Articles, Charts, and Guides
Bitcoin Magazine: Bitcoin News, Articles, Charts, and Guides