What is a collection of dust sized particles od solidified gases and water seen from earth as spectacle of a luminous head and a thin veil?

A collection of dust-sized particles of solidified gases and water, seen from Earth as a luminous head and a thin veil, describes a comet. When a comet approaches the Sun, it heats up, causing the solid materials to sublimate and release gas and dust, forming a glowing coma and a tail that can be visible from Earth. This phenomenon creates a striking visual spectacle in the night sky.