to successfully predict the appearance of anti-tails in comets C/1973 E1 (Kohoutek) and C/1975 V2 (Bradfield).

The Finson-Probstein (F-P) diagram on the right is for Comet Arend-Roland on April 28, 1957 about 2 days after the Earth crossed the comet's orbital plane. The view is looking down on the orbital plane. The solid lines are synchrones which represent streams of particles emitted at the same time with smaller, lighter particles (those with larger ) travelling further from the nucleus. The synchrones are labeled with the time in