For the last few years, I have been developing the Ruby library Astronoby (https://github.com/rhannequin/astronoby) with as much dedication and perseverance I could while I don't have any scientific academic background. My end goal was to use this library and build a website that not only provides as much data as possible, but let anyone access and understand how it was computed. This goal is on its was of completion with Caelus.

Of course the website is still quite new and there are many features I will implement in the coming weeks and months, including the ability to set any date, having a global view of the Solar System, having an interactive sky chart, a tool to prepare your observation night, having the website in multiple languages, etc.

I believe astronomical data should be universal and anyone should be allowed to easily access this data, manipulate it, understand how it was generated, and contribute to and with the community.

My goal is to make this project truly collaborative. I am open to feedback, ideas, requests, bugs, everything, to offer the community open source astronomical data.

Thank you all.

Website: https://caelus.siderealcode.net

Source code: https://github.com/rhannequin/caelus