Mastodawn

Are you a user of Astronoby, or you consider using it? I need your help to choose the next big feature to develop!

Here are 3 major features I’m considering:
- Earth satellite tracking and predictions
- Eclipses local circumstances
- Comets and minor planets observation

Is there one that you’d love first?

Rémy Hannequin Dec 9

📣 New on Caelus: You can now use a custom time and use all the features for any date between 01/01/1900 and 01/01/2100.
https://caelus.siderealcode.net

Rémy Hannequin Nov 3

Introducing Caelus, an open source astronomical dashboard https://dev.to/rhannequin/introducing-caelus-569h

Introducing Caelus

It's not often you finally build something you've been dreaming about for more than a decade. For me,...

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Rémy Hannequin Sep 18, 2025

Rob Whittaker

Sep 18, 2025

Being surrounded by #RubyFriends, old and new, at #Euruko inspired me to rejoin the instance. Being around so much love and energy in the #Ruby community is fantastic. It’s my first Euruko and my first time seeing @matz live. As always, @marcoroth is pushing #Rails forward, and I can’t wait to plug in Herb on my next project. Finally, I was proud to see my teammate, @rhannequin, give his talk with such coolness and aplomb. Roll on day two tomorrow!

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Rémy Hannequin Sep 1, 2025

Check-out the release notes and stay tuned for new things soon!
https://github.com/rhannequin/astronoby/releases/tag/v0.8.0

Release v0.8.0 · rhannequin/astronoby

0.8.0 - 2025-09-01 If you are upgrading: please see UPGRADING.md. Bug fixes Fix UPGRADING documentation (#178) Fix possible division by zero in RTS (#185) Features Introduce performance benchmar...

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Rémy Hannequin Sep 1, 2025

It also adds multiple new attributes for solar system bodies like the phase angle, illuminated fraction, constellation or angular diameter.

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Rémy Hannequin Sep 1, 2025

Now a bit more about Astronoby v0.8.0.

It includes major performance improvements by introducing a LRU cache on expensive calculations. This enables to have calculations like rise and set or twilight much faster.

Rémy Hannequin Sep 1, 2025

Astronoby v0.8.0 is out, and to celebrate it I wrote a blog post on how to calculate the best days for planetary observation!
https://dev.to/rhannequin/how-to-calculate-the-best-days-for-planetary-observation-28k

How to calculate the best days for planetary observation

A few months ago, I started a tradition: each time I release a new version of Astronoby, I write a...

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Rémy Hannequin Jul 31, 2025

With a few dozens lines my project is set up and with enough quality to go straight to production and receive early feedback. It's ready to get real features built on top with efficient CI and CD.
It didn't take long and it's super nice to be already sharable with the community.
https://github.com/rhannequin/rhannequ.in/pull/1

Introduce Caelus by rhannequin · Pull Request #1 · rhannequin/rhannequ.in

This introduces Caelus, an accurate and open-source astronomical ephemeris. This project is meant to use Astronoby and other tools to provide accurate astronomical data while keeping the code open-...

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Rémy Hannequin Jul 31, 2025

- Want some easy styling helpers? Install TailwindCSS and it's ready for dev and prod.
- Presentation code duplication? Just use a helper.
- Code coverage? On a personal project?? Don't be that person, and with GitHub Actions set up by default it's so rewarding.
- Fast deployment? Use Kamal.