Access
To read this story in full you will need to login or make a payment (see right).
News and Views
Nature 422, 30-31 (6 March 2003) | doi:10.1038/422030a
Open Innovation Challenges
-
Novel Approaches to Protecting Maize from Insect Damage
The Seeker is looking for novel approaches to protecting maize from insect damage. This Challenge re...
-
Single-cell Analysis Platform
This Challenge is looking for novel approaches to analyzing changes at a single-cell level. This is...
- More Challenges
- Powered by:
nature jobs
Project Director, Nouabalé-Ndoki Park Project
- Wildlife Conservation Society
- Congo Republic
Senior Scientific Manager / Chief Scientific Manager for Metabolic Disorder and Cardiavascular Area In Vivo Pharmacology / Biology
- Syngene International
- Bangalore, Karnataka 560099 India
Planetary science: Kuiper-belt interlopers
A. Morbidelli & H. F. Levison
Abstract
Objects in the Kuiper belt, which lies beyond Neptune, occur as two distinct populations. One group may have migrated from a region closer to the Sun, caught by Neptune's gravity as it wandered in the early Solar System.
When astronomers first postulated the existence of a belt of small bodies beyond Neptune — now called the Kuiper belt — they imagined a disk of planetesimals (primordial icy bodies) in which the conditions of the early Solar System were perfectly preserved. But when these objects were finally discovered, astronomers realized that this is not so: the Kuiper belt is dynamically excited, as if something had kicked it very hard.
To read this story in full you will need to login or make a payment (see right).
