Roth's Fiction from Nemesis to Nemesis

Nemesis Reconsidered

The hypothesis of a companion object (Nemesis) orbiting the Sun was motivated by the claim of a terrestrial extinction periodicity, thought to be mediated by comet showers. The orbit of a distant companion to the Sun is expected to be perturbed by the Galactic tidal field and encounters with passing stars, which will induce variation in the period. We examine the evidence for the previously pro...

Medical nemesis?

Nemesis of neglected neurosarcoidosis

Neurosarcoidosis (NS) is diagnosed when noncaseating granulomas develop in the nervous system, often associated with similar pathology in other organs. While lung and skin manifestation are more common, the neurological manifestations including meningitis, parenchymal brain or spinal cord lesions, or cranial or peripheral nerve damage are among the most serious and difficult to treat manifestat...

Mass limit on Nemesis

We assume that if the sun has a companion, it has a period of 27 Myr corresponding to the periodicity seen in cometary impacts on earth. Based on this assumption, it is seen that the inner Lagrengian point of the interaction between the Sun and its companion is in the Oort cloud. From this we calculate the mass – distance relation for the companion. We then compute the expected apparent magnitu...

The Nemesis of Folly

ing from consequences which were virtually certain to arrive, sooner or later. The exigencies of monthly publication preclude us from quoting figures which vary from day to day, and it must be enough to say that the number of cases at Gloucester Avhich have been diagnosed as small-pox has been so large that the utmost anxiety is reasonably felt as to when, and where, the epidemic will end. Thes...