A ‘Once-in-a-Millennium’ Asteroid Flyby in 2029 May Be Seen by 90% of the World

An extraordinary sky event does not need to threaten Earth to command worldwide attention. Sometimes, the remarkable part is simply being present when nature creates something humans have never knowingly anticipated before.

New visibility maps show how widely this moment could be shared. They also reveal why “visible to most of the world” requires important qualifications involving timing, weather and darkness.