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Science 15 October 1999:
Vol. 286. no. 5439, pp. 385 - 386
DOI: 10.1126/science.286.5439.385a
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News of the Week

PLANETARY SCIENCE:
Another Distant Consort for the Sun?

Richard A. Kerr

This week, two groups of researchers independently proposed that an object several times more massive than Jupiter is orbiting out among the comets of the Oort Cloud, some 25,000 to 30,000 times farther from the sun than Earth. Both groups argue that this unseen behemoth gravitationally perturbs Oort Cloud comets, sending them toward Earth along a distinctive sky-girdling band. But the evidence doesn't impress many other researchers.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)