BBC Sky at Night

Make a paper equatorial sundial

Practical astronomy projects for every level of expertise

Mary McIntyre is an outreach astronomer and teacher of astrophotography

Our ancient ancestors had to use the Sun as a clock, something it’s easy to forget while surrounded by modern devices. A fixed object on a sunny day will cast a shadow and as the Sun moves across the sky that shadow will change position. This basic principle underpins most sundial designs and here we show you how to make a paper equatorial sundial.

The time told by the Sun

You’re reading a preview, subscribe to read more.

More from BBC Sky at Night

BBC Sky at Night1 min read
This Month's Contributors
“Star parties are one of the best things about this hobby: a chance to meet fellow stargazers under dark skies. But oh, how they’ve changed!” Join Stuart for a look back at astronomy events of yesteryear, on page 34 “As a high-school student, I thoug
BBC Sky at Night2 min read
Scope Doctor
Email your queries to scopedoctor@skyatnightmagazine.com How do I align my equatorial mount? FRASER DAVID You haven’t told us whether you have a polarscope installed in your mount. Assuming that you don’t, here’s how to achieve a basic polar alignmen
BBC Sky at Night3 min read
Deep-sky Tour
Shortening nights mean this month’s tour is best seen at the start of May. We start with the iconic form of M104, the Sombrero Galaxy. This is a mag. +8.0 side-on peculiar galaxy with a prominent dust lane running south of its equatorial plane. Locat

Related Books & Audiobooks