Reblog via Nizar Kerkeni 🇹🇳 نزار القرقني
Happy Galactic Tick Day! (On September 10, actually)
The Earth takes 365.25 days to travel around the Sun.
The Sun takes 225 Million years to travel around the galactic center.
Galactic Tick Day celebrates one centi-arcsecond of the trip. (0.00000077% of the full journey)
It happened on Dec 15, 2021, and will happen again on June 5, 2025.
Celebrate by boosting this post so everyone will know that today is special! ☀️🕰️
Edit: h/t to
Wikipedia has the wrong dates.