Celestia is a stripped-down layer-1 blockchain that focuses solely on ordering transactions and making the data for transactions available. The blockchain does not handle smart contracts or perform computations.
Celestia Launches Devnet
Nick White
https://blog.celestia.org/celestia-launches-devnet/
Web
December 14, 2021
Celestia: The General-Purpose Data Availability Layer of the Decentralized Internet
Georg (Juri) Stricker
https://medium.com/signature-ventures/lazyledger-the-general-purpose-data-availability-layer-of-the-decentralized-internet-96005f46af29
March 19, 2021