Risk scale
The Palermo Scale
A more technical, logarithmic scale used by specialists to rank impact hazards against the background risk of a random impact of the same size over the same time. Values below zero mean a threat less than the everyday background; above zero warrants attention.
Surveys, missions & objects
Knowledge connections
- Associated withRisk Assessment
- Associated withCNEOS
Sources
The primary and reference sources this topic draws on.
- NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.