Colin Wright personal blog
Measuring the size of the Earth by watching a shadow on a wall
Recently I've been discussing the details of measuring the size of the Earth by watching a shadow descending a wall at sunrise, or ascending at sunset. The sums are easy enough if you do it at either Equinox, and at the Equator, and you can read about it here:
- Points
- 104
- HN comments
- 16
- Submissions
- 1
- Cited by
- 0 commenters
Science & SpaceMath & Algorithms2019
On Hacker News
| Submitted | Title on HN | Points | Comments |
|---|---|---|---|
| Jan 3, 2019 | Measuring the size of the Earth by watching a shadow on a wall by ColinWright | 104 | 16 |
