Detail Large Longitude Libration of Mercury Reveals a Molten Core   Oleh:  Margot, J.L. ; Peale, S.J. ; Jurgens, R. F ; Slade, M.A. ; Holin, I. V Jenis: Article from Bulletin/Magazine Dalam koleksi: SCIENCE (keterangan: ada di Proquest) vol. 316 no. 5825 (May 2007), page 710. Topik: Planetary Science Ketersediaan Perpustakaan FK Nomor Panggil: S01.K.2007.05 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel Observations of radar speckle patterns tied to the rotation of Mercury establish that the planet occupies a Cassini state with obliquity of 2.11 +- 0.1 arc minutes. The measurements show that the planet exhibits librations in longitude that are forced at the 88-day orbital period, as predicted by theory. The large amplitude of the oscillations, 35.8 +- 2 arc seconds, together with the Mariner 10 determination of the gravitational harmonic coefficient C22, indicates that the mantle of Mercury is decoupled from a core that is at least partially molten. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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