Galactic Tick Day
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Galactic Tick Day is an awareness and education day that celebrates the movement of the Solar System around the Milky Way galaxy.
The day occurs at a regular interval of 1.7361 years (or 633.7 days), which is called a galactic tick. The interval is derived from one centi-arcsecond of a galactic year, which is the Solar System's roughly 225-million-year trip around the Galactic Center. One galactic tick is only about 0.00000077 percent (1/[360 × 60 × 60 × 100]) of a full galactic year.
Occurrences
The Galactic Tick Day was retroactively calculated to begin on the day Hans Lippershey filed the patent for the telescope on 2 October 1608. The first observance of the holiday was on 29 September 2016, the 235th Galactic Tick Day. Below is a list of further observances:
| GTD number | Date | Ref |
|---|---|---|
| 1st | 2 October 1608 | |
| 235th | 29 September 2016 | |
| 236th | 26 June 2018 | |
| 237th | 21 March 2020 | |
| 238th | 15 December 2021 | |
| 239th | 10 September 2023 | |
| 240th | 5 June 2025 | |
| 241st | 1 March 2027 | |
| 242nd | 24 November 2028 | |
| 243rd | 20 August 2030 |
See also
External links
- about Galactic Tick Day
- musical compositions on SoundCloud
- on GitHub