Arend-Roland comet

Arend–Roland comet

(ah -rĕnd rol-ahnd , air -ĕnd roh-lănd) (1957 III) A comet discovered by S. Arend and G. Roland in the course of routine work on asteroids. It was unusual because it had a sunward spike: many of the solid particles ejected from the nucleus near perihelion remained in the orbital plane of the comet; as the Earth passed through the orbital plane the sunlight reflected from the particles combined to give a luminous spike.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006