The 100 Hours of Astronomy is a global event composed of a broad range of activities aimed at involving the public. Amateur and professional astronomers, astronomy enthusiasts and the general public are all invited to share their knowledge and enthusiasm for space by taking part in a scheduled activity or to organize one their own as part of the 100 Hours of Astronomy event.
This year it will take place on October 1-4, 2021. All around the world events will take place over four days and nights. The events are being organized and can take place at any time, for any duration, throughout this 100-hour period.
