- The Earth’s equatorial radius is 6,378.1 kilometres.
- The Sun’s equatorial radius is 6.955×105 km, about 109 times that of Earth.
- The Moon’s equatorial radius is 1,738.14.
- Land makes up 29% of the Earth’s surface.
- From the surface of the Earth, the Sun’s apparent size is 25% that of the Earth,
- While the Moon’s apparent size is 27%.
And if you put that together…
What does all this mean? Nothing in particular, it’s just something I was thinking about the other day while swimming, notably the comparison in circle terms between the amount of land and sea, reversing how we usually perceive both, and the comparison between Sun and Moon, driving tides and how much we as swimmers like a bit of sunshine on our backs to keep us warm. All these all feature in everyone’s lives, but maybe as an open water swimmer, I think more about them, as least for brief periods.