Apps and websites
Every solar eclipse seen from the place of your choice, from 2000 BC to the year 3000: the drawing of each Sun–Moon encounter, the map of the shadow and the animation of its passage.
Since 20 August 2026
English, French, Spanish
Solar eclipses told and calculated: their history, their mechanics, the ones to come, country by country, and the great eclipses of the past.
Since 22 August 2026
English, Arabic, French, Portuguese, Spanish
Where to look, when, and with what to see the first crescent Moon after the new Moon. The calculation happens on the phone.
Since 21 September 2026
English, Arabic, French
One number is the sum of the others, and the tiles disappear. Two games, one grid to clear.
Since 19 August 2026
English, Arabic, French, German, Greek, Italian, Japanese, Korean, Portuguese, Spanish
Gravity is the challenge: twenty-two levels from Newton to Einstein, endless boards and a star-system builder.
Since 21 September 2026
English, French
The score of your travels: the places you visited on a map, the share of the globe you have covered, your altitude record, and a worldwide leaderboard under a pseudonym.
Since 19 August 2026
English, French