Results 141 to 150 of about 9,980 (290)
Nebraska Astronomy Applet Project [PDF]
The Nebraska Astronomy Applet Project has developed a series of modules that use high-quality simulations to introduce students to important astronomical and astrophysical phenomena.
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The 40K‐K dating system: 1. Improving data interpretation using new model calculations
Meteoritics &Planetary Science, EarlyView.Abstract The 40K‐K cosmic‐ray exposure (CRE) dating system offers a promising method for determining exposure ages of iron meteorites by combining the radioactive cosmogenic 40K with the stable cosmogenic isotopes 39K and 41K. However, earlier applications relied on semi‐empirical production models and inconsistent analytical data sets, limiting their ...
Farshid Nozarian +2 more
wiley +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract The light element distribution in planetary cores and the processes driving core evolution in rocky planets are poorly understood. Magmatic iron meteorites are samples from the cores of ancient embryonic planetesimals and therefore provide a window into the processes governing core evolution. We performed high precision oxygen isotope analyses
R. J. Windmill +4 more
wiley +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract Here we report on the microstructure and chemistry of sulfide minerals returned from asteroid (162173) Ryugu. We identify a unique sulfide population in particle A0016 composed of violarite (FeNi2S4), pyrite (FeS2), chalcopyrite (CuFeS2), pyrrhotite (Fe1‐xS), and pentlandite ([Fe,Ni]9S8).
M. C. Benner +3 more
wiley +1 more source
Displaced periodic orbits with low-thrust propulsion [PDF]
, 2009 Solar sailing and solar electric technology provide alternative forms of spacecraft propulsion. These propulsion systems can enable exciting new space-science mission concepts such as solar system exploration and deep space observation.
Simo, Jules +2 more
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Crystallization of dmisteinbergite (hexagonal CaAl2Si2O8) from type B CAI analog melt
Meteoritics &Planetary Science, EarlyView.Abstract Dmisteinbergite is a metastable polymorph of CaAl2Si2O8, which has been found in calcium−aluminum‐rich inclusions (CAIs) in chondrites, although anorthite is the predominant CaAl2Si2O8 phase in natural type B CAIs. The occurrence/absence of igneous dmisteinbergite would put tighter constraints on the thermal history of CAIs.
Yasuaki Tsuruoka +6 more
wiley +1 more source
The Solar System Sourcebook [PDF]
, 1997 This sourcebook contains information about each of the nine planets, the sun, comets, asteroids, meteors, meteorites, and other issues of interest to astronomy students.
Devin Shanthikumar, Louis Dang
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Eruption of a Million-Kelvin Warm Magnetic Flux Rope on the Sun
The Astrophysical JournalSolar magnetic flux rope (MFR) plays a central role in the physics of coronal mass ejections (CMEs). It mainly includes a cold filament at typical chromospheric temperatures (∼10,000 K) and a hot channel at high coronal temperatures (∼10 MK).
Leping Li +6 more
doaj +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract We report the discovery of the second (Al,Cu)‐alloy–bearing micrometeorite, FB‐A2, recovered from Mount Gariglione (southern Italy), representing the sixth such occurrence worldwide. Although chondritic in nature, FB‐A2 differs markedly from previously described microspherules.
Giovanna Agrosì +6 more
wiley +1 more source
Radar Astronomy of Solar System Plasmas, Scientific Report No. 4 [PDF]
, 1964 Radar astronomy applied to cislunar, solar, interplanetary, ionospheric, and atmospheric ...
Von Eshleman, R.
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