Teachable moments with the sun and moon

Huambo, Angola, 2017

Welcome to Ten Sentences. We use solar and lunar eclipses as ‘teachable moments’. Our aims are to help young people across the globe think more deeply about science, communication and working across borders. Our recent projects include USA 2017, Angola 2017 and Indonesia 2016, and we have been featured in Sky & Telescope, EarthSky and other media.

Palu, Indonesia, 2017Image: Juan Carlos Casado

What is a teachable moment?
Here is a wonderful definition: the occasion when students are “caught by phenomena, events or situations” that create “a need to know and increased motivation to learn.”

Penang Bridge, Malaysia, 2016Image: Jordan Lye

Why solar and lunar eclipses?
Three reasons: they provide unique teachable moments; they are powerful shared experiences; they are truly global events.

And why is this website called Ten Sentences?
The name is a tribute to Abraham Lincoln. His Gettysburg Address is an awe-inspiring example of communication – and it contains just ten sentences. Lincoln was also a champion of science and education.



NEVER look at the sun with the naked eye. Even if the sun is 99% covered by the moon, the remaining sunlight is extremely bright and can cause permanent damage to the eye. (The only time it is safe to view a solar eclipse with the naked eye is during the few short minutes or seconds of totality during a total eclipse.)