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.
Quantum Gravity Bridge: Secure Off-Chain Data Availability for Ethereum L2s with Celestia
Aditi
https://blog.celestia.org/celestiums/
Web
February 8, 2022
The Ethereum Off-Chain Data Availability Landscape
https://blog.celestia.org/ethereum-off-chain-data-availability-landscape/
February 14, 2022
Celestia - Scalable Shared Security for Millions of Blockchains
November 30, 2021
https://www.youtube.com/watch?v=1sHl4G22AzQ
Rollups and Data Availability - Building a Modular Blockchain Stack
October 20, 2021
https://www.youtube.com/watch?v=PaSa6vvbeRk