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From: cu-arpa.dietz@Cornell.ARPA
Newsgroups: net.space
Subject: Poynting Robertson Effect
Message-ID: <1023@sri-arpa.UUCP>
Date: Sun, 17-Jun-84 14:33:00 EDT
Article-I.D.: sri-arpa.1023
Posted: Sun Jun 17 14:33:00 1984
Date-Received: Fri, 22-Jun-84 06:49:46 EDT
Lines: 8

My explanation of the Poynting-Robertson effect was slightly wrong.
The emission of radiation from the particle does not change its
momentum; rather, more starlight hits the front of the particle than
the back due to abberation.

A similar phenomenom limits the maximum energy cosmic ray particles can
have.  If they travel too fast they lose energy by scattering off
3 K background photons (blue shifted to gamma rays).