Results 171 to 180 of about 2,834 (210)

Satellites, Comets, and Interplanetary Material. [PDF]

Proc Natl Acad Sci U S A, 1953
Kuiper GP.
europepmc   +1 more source

Psyche Mission Description and Design Rationale. [PDF]

Space Sci Rev
Polanskey CA, Elkins-Tanton LT, Bell JF, Alonge EK, Bairstow SH, Binzel RP, Biswas A, Bury L, Cisneros E, Han D, Jun I, Klipstein WM, Lawrence DJ, McCoy TJ, Mastrodemos N, Merayo JMG, Noble SK, Oh DY, Oran R, Ortega CA, Park RS, Peplowski PN, Prettyman TH, Rayman MD, Ream JB, Roatsch T, Weise TM, Wenkert DD, Weiss BP, Zuber MT.   +29 more
europepmc   +1 more source

On the Origin of Pluto and the Masses of the Protoplanets.

The Astrophysical Journal, 1957
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Protoplanets (review)

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Growth of a Migrating Protoplanet

Icarus, 1999
Abstract In the solar nebula, protoplanets may rapidly migrate to the Sun due to the tidal interaction with the nebula disk (e.g., Ward 1986, Icarus67, 164–180). We investigated the growth rate of a migrating protoplanet accreting planetesimals. The collision rate between the protoplanet and planetesimals strongly depends on the orbital elements of ...
, Shigeru Ida
exaly   +2 more sources

Grain sedimentation in a giant gaseous protoplanet [PDF]

Icarus, 2008
We present a calculation of the sedimentation of grains in a giant gaseous protoplanet such as that resulting from a disk instability of the type envisioned by Boss (1998). Boss (1998) has suggested that such protoplanets would form cores through the settling of small grains.
Ravit Helled, Morris Podolak, A Kovetz   +2 more
exaly   +3 more sources

Segregation of heavy elements in an initial protoplanet

Earth Science Informatics, 2020
In this paper, we present a calculation for settling times of grains falling under the action of the gravitational field inside a Jupiter mass protoplanet formed via disk instability, where the grains are assumed to be grown by the process of cold welding. As the energy equation, we have considered the conductive-radiative case of heat transport.
Eaqub Ali, Mrinal Chandra Barman
exaly   +2 more sources

Oligarchic Growth of Protoplanets

Icarus, 1998
We investigate the growth and the orbital evolution of protoplanets embedded in a swarm of planetesimals using three-dimensionalN-body simulations. We find that among protoplanets, larger ones grow more slowly than smaller ones, while the growth of protoplanets is still faster than that of planetesimals.
Kokubo, E., Ida, S.
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Accretion rates of protoplanets

Icarus, 1990
Projections are made of the collision/accretion rates of planetesimals in a uniform surface-density disk with a massive protoplanet, whose collision cross-section is enhanced, relative to its geometric cross-section, by a gravitational focusing of the planetesimals' trajectories.
Yuval Greenzweig, Jack J. Lissauer
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Protoplanet Migration by Nebula Tides

Icarus, 1997
Abstract The tidal interaction of a protoplanet with a circumstellar gaseous disk results in mutual angular momentum exchange that modifies both the disk and the orbit of the secondary. There are two, conceptually distinct circumstances wherein nebula torques can cause a secular variation in a protoplanet's semimajor axis.
William R Ward
exaly   +2 more sources