Diagram of the Milky Way. The current position of the Solar System shown by an arrow.
| Galactic Tick Day | |
|---|---|
| Observed by | international |
| Type | Educational |
| 2023 date | 10 September |
| 2025 date | 5 June |
Galactic Tick Day is an awareness and education day that celebrates the movement of the Solar System around the Milky Way galaxy.[1][2][3][4]
The day occurs at a regular interval of 1.7361 years (or 633.7 days),[5] 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.[6] One galactic tick is only about 0.00000077 percent (1/[360 × 60 × 60 × 100]) of a full galactic year.[7]
- ^ "You Should Celebrate Galactic Tick Day, the New Holiday That Spans the Milky Way". Popular Mechanics. 23 August 2016.
- ^ MacDonald, Fiona (29 September 2016). "Happy Galactic Tick Day! You just moved around the Milky Way". sciencealert.com.
- ^ Schramm, Michael (29 September 2016). "What's a galactic tick (and why are we celebrating it today?)". Michigan Radio.
- ^ Sedacca, Matthew (29 September 2016). "Today Is "Galactic Tick Day"!". Nautilus (science magazine). Archived from the original on 21 March 2020. Retrieved 1 October 2016.
- ^ "Se acerca el Galactic Tick Day ¿Qué se celebra?". Europa Press (news agency) Ciencia Plus.
- ^ "'Galactic Tick Day' Celebrates Sun's Trip Around the Galaxy". Space.com. 6 September 2016.
- ^ "Strange Science: Earth reaches Galactic Tick Day!". KIAH News Fix.