Meteoroid Trails Could Help Detect Potentially Hazardous Comets Years in Advance https://ift.tt/YHnpMsD Meteoroid Trails Could Help Detect Potentially Hazardous Comets Years in Advance New research has revealed that meteoroid trails, left behind by long-period comets , could help scientists detect potentially hazardous comets years before they approach Earth. These rare comets, which take hundreds or even thousands of years to complete their orbits, often go unnoticed until it is too late to prepare for a possible collision. However, scientists have now found a way to track t…