UPDATE: celest.dev is now INACTIVE

[dcrebbin]

I'm not on the team but it's come to my attention that celest.dev has been postponed/ceased operations.
The Y Combinator website states that the project is now inactive: ycombinator.com/companies/celest
I've also heard anecdotally from contacts close to the project that this is the case as well.

[igormidev]

Wow, really sad... The project overall ideia was good...