The International Meteor Organization cyberattack has knocked much of the Belgium-based nonprofit's website offline, with the organization warning that several weeks of partial downtime could follow as it moves to new infrastructure and services.

The International Meteor Organization (IMO), which coordinates meteor observations and connects amateur and professional astronomers worldwide, is currently operating a stripped-down holding page following the incident. The organization said the attack dealt a "critical blow" to its aging infrastructure.

"We recently suffered a cyberattack that dealt a critical blow to aging infrastructure, taking much of our site offline," IMO said in a notic...