... The accretion of dust and larger meteoroids contained within the cometary dust trail could pose a serious environmental hazard to Earth, possibly affecting the Earth's climate. ...
... including celestial mechanics, planetary science, and the dynamical evolution and interrelationships of comets, asteroids, meteoroids and interplanetary dust), and (iv) Solar System - Terrestrial Relationships (including solar variability, climate ...
... Asher, D.J., Bailey, M.E. , Emel'yanenko, V.V., 1999, ``Resonant meteoroids from Comet Tempel-Tuttle in 1333: the cause of the unexpected Leonid outburst in 1998'', MNRAS, 304, L53-L56. ...
... In fact, the above trail encounter data should not be interpreted as having the same accuracy as data for very young trails, because these older trails have had more time for the meteoroids in them to become more scattered or disrupted. ...
... In this case the relatively high speed of the meteoroid and its final fragmentation at high altitude is suggestive of a cometary source, though many fireballs would have orbits similar to those of the majority of near-Earth asteroids. ...
... The most widely accepted explanation is that they comprise ice crystals that have condensed on tiny meteoric particles, which themselves have come from meteoroids or interplanetary dust impacting the EarthтАЩs atmosphere. ...