Heliocentric Dependence of Sodium Emission of Comet Hale-Bopp (C/1995O1)

Sodium Emission in Cometary Comae

The Morphological Change of the Sodium Tail in Comet Hale-Bopp (C/1995 O1)

Comet C/1995 O1 (Hale-Bopp)

Comet C/1995 O1 (Hale-Bopp)