# @worldscifest on Instagram

- **Type:** Image
- **Original URL:** https://www.instagram.com/p/h_kyLgE9kS
- **Gondola URL:** https://gondola.cc/posts/2462023-worldscifest-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/ce650a65e4.jpg
- **Posted:** 2013-12-16T18:56:36.000+00:00
- **Account Owner:** WorldScienceFestival (@WorldSciFest) — https://gondola.cc/WorldSciFest

## Caption

#Cassini's #sundial line--traced on the floor of the Basilica of San Petronius, Bologna, in 1655.  It is the longest sundial line in the world: 66.8 metres, equal to 1/600,000 of the #Earth's #circumference.

## Stats

- **Views:** 0
- **Likes:** 12
- **Shares:** 0
- **Comments:** 1

## Tags

sundial, circumference, earth, cassini

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