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Migrating planets

Article Abstract:

New evidence indicates that the outer planets of the solar system may have migrated from their original orbits. These planets may have accreted from their parent stars at distances similar between Jupiter and the sun before migrating to their present positions.

Author: Malhotra, Renu
Publisher: Scientific American, Inc.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 1999
Research, Solar system, Planets, Orbits (Astrophysics)

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The Hidden Ocean of Europa

Article Abstract:

Images taken from the Galileo spacecraft show Europa to be a moon covered in a crust of ice as thick as one hundred meters. Scientists theorize that the warming tidal forces of Jupiter could maintain a liquid ocean underneath Europa's ice.

Author: Head, James W., Greeley, Ronald, Pappalardo, Robert T.
Publisher: Scientific American, Inc.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 1999
Observations, Discovery and exploration, Outer space, Space exploration, Europa (Satellite), Jupiter probes

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