Results 1 to 10 of about 24,424 (315)
Fine Structure in Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 1974 A short report is presented on the aperture synthesis radio observations of planetary nebulae performed by Terzian et al. (1974). Examples of radio maps at 8085 MHz are shown with angular resolutions of the order of 2″ to 3″.
Yervant Terzian
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Morphological Structures of Planetary Nebulae [PDF]
Publications of the Astronomical Society of Australia, 2010 AbstractSince various structural components of planetary nebulae (PN) manifest themselves differently, a combination of optical, infrared, submillimetre and radio techniques is needed to derive a complete picture of planetary nebulae. The effects of projection can also make derivation of the true 3-D structure difficult.
Sun Kwok
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Performances of Planetary Magnetorheological Transmission Devices
Frontiers in Materials, 2022 Magnetorheological transmission devices (MRTDs) are a type of power transmission device using magnetorheological fluids (MRFs) as the transmission medium, which have the advantages of rapid response and continuously adjustable output performances.
Xuli Zhu +5 more
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Planetary Internal Structures [PDF]
, 2014 This chapter reviews the most recent advancements on the topic of terrestrial and giant planet interiors, including Solar System and extrasolar objects. Starting from an observed mass-radius diagram for known planets in the Universe, we will discuss the various types of planets appearing in this diagram and describe internal structures for each type ...
Baraffe, I +3 more
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The Planetary Science Journal, 2023 Magma oceans (MOs) are episodes of large-scale melting of the mantle of terrestrial planets. The energy delivered by the Moon-forming impact induced a deep MO on the young Earth, corresponding to the last episode of core-mantle equilibration.
Maxime Maurice +2 more
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NASA’S PLANETARY GEOLOGIC MAPPING PROGRAM: OVERVIEW [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 NASA’s Planetary Science Division supports the geologic mapping of planetary surfaces through a distinct organizational structure and a series of research and analysis (R&A) funding programs.
D. A. Williams
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Structuring eccentric-narrow planetary rings [PDF]
Icarus, 2005 (Abridged) A simple and general description of the dynamics of a narrow eccentric ring is presented.We view an eccentric ring which precesses uniformly at a slow rate as exhibiting a global $m=1$ mode originating from a standing wave superposed on an axisymmetric background.We adopt a continuum description using the language of fluid dynamics which ...
Papaloizou, J. C. B. +1 more
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Exploring Martian Magnetic Fields with a Helicopter
The Planetary Science Journal, 2023 The era of helicopter-based surveys on Mars has already begun, creating opportunities for future aerial science investigations with a range of instruments.
Anna Mittelholz +8 more
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The Planetary Theory of Solar Activity Variability: A Review
Frontiers in Astronomy and Space Sciences, 2022 Commenting the 11-year sunspot cycle, Wolf (1859, MNRAS 19, 85–86) conjectured that “the variations of spot-frequency depend on the influences of Venus, Earth, Jupiter, and Saturn.” The high synchronization of our planetary system is already nicely ...
Nicola Scafetta, Antonio Bianchini
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The Temperature Structure of Dusty Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 2001 We have computed photoionization models of planetary nebulae containing dust. Photoelectric heating by small grains has an important effects on the temperature structure of the nebulae and could solve a number of problems that have found no satisfactory solution so far.
Stasinska, Grazyna, Szczerba, Ryszard
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