EOS Experts Guide - by topic and by name
... Brief biographies of scientists from the three EOS centers — the Earth Systems Research Center, Ocean Process Analysis Laboratory, and the Space Science Center — provide areas of specialty, research interests, credentials, and contact information. Experts can also be found by means of an alphabetica ...
... Brief biographies of scientists from the three EOS centers — the Earth Systems Research Center, Ocean Process Analysis Laboratory, and the Space Science Center — provide areas of specialty, research interests, credentials, and contact information. Experts can also be found by means of an alphabetica ...
Chandra
... photospheric abundances by selectively removing certain elements (Babel 1995). This paper, however, will focus on high-density, O-star winds, in which momentum sharing is quite efficient. An accelerating wind, by definition, consists of material at a range of velocities. The velocity dispersion in t ...
... photospheric abundances by selectively removing certain elements (Babel 1995). This paper, however, will focus on high-density, O-star winds, in which momentum sharing is quite efficient. An accelerating wind, by definition, consists of material at a range of velocities. The velocity dispersion in t ...
NASA/TM—2005–213688 National Aeronautics and Space Administration AD33
... Wilson, 1995, 1997). The most significant constituents of this environment are energetic protons and heavy ions during SEP events (Shea, 1990; Sauer, 1990) with energies up to a few 100 MeV, and GCRs (Badhwar, 1996; Wiebel, 1994; Nymmik, 1992), which consist of protons and heavy ions with energies ...
... Wilson, 1995, 1997). The most significant constituents of this environment are energetic protons and heavy ions during SEP events (Shea, 1990; Sauer, 1990) with energies up to a few 100 MeV, and GCRs (Badhwar, 1996; Wiebel, 1994; Nymmik, 1992), which consist of protons and heavy ions with energies ...
The Physics and Chemistry of Nebular Evolution
... general makeup of the meteorites are fairly similar. A major component of chondritic meteorites are chondrules, which can make up as much as 80% of the volume of a given meteorite. Chondrules are roughly millimeter-sized, igneous, ferromagnesium silicates that are considered to be evidence for trans ...
... general makeup of the meteorites are fairly similar. A major component of chondritic meteorites are chondrules, which can make up as much as 80% of the volume of a given meteorite. Chondrules are roughly millimeter-sized, igneous, ferromagnesium silicates that are considered to be evidence for trans ...
The Non-Thermal Universe - Astroparticle physics in the Netherlands
... charged the ApPEC Peer Review Committee (PRC) in 2005 to prepare a roadmap for astroparticle physics in Europe* which covers the next decade. The need for such a readmap arises since projects in astroparticle physics move to ever larger sensitivity and scale, with costs of individual projects on the ...
... charged the ApPEC Peer Review Committee (PRC) in 2005 to prepare a roadmap for astroparticle physics in Europe* which covers the next decade. The need for such a readmap arises since projects in astroparticle physics move to ever larger sensitivity and scale, with costs of individual projects on the ...
Krypton in presolar mainstream SiC grains from AGB stars
... at the last third dredge−up episode (25th TP) for an AGB star with initial mass M= 3 M , [Fe/H] = −0.52. The predicted (86 Kr/82 Kr)s ratio is too high with respect to SiC grains observations. This means that, for metallicities ≤ 1/3 Z , the Kr−S predictions in the hot implantation scenario do not ...
... at the last third dredge−up episode (25th TP) for an AGB star with initial mass M= 3 M , [Fe/H] = −0.52. The predicted (86 Kr/82 Kr)s ratio is too high with respect to SiC grains observations. This means that, for metallicities ≤ 1/3 Z , the Kr−S predictions in the hot implantation scenario do not ...
Combined wind measurements by two different lidar instruments in
... one single seed laser, whose frequency is stabilized by iodine absorption spectroscopy at line 1109 (λ = 532.260 nm) (Baumgarten, 2010). This frequency stability was found to be better than 6 MHz over three years, and for an exemplary day in January 2009 we found 200 kHz over 24 h. Nevertheless, the ...
... one single seed laser, whose frequency is stabilized by iodine absorption spectroscopy at line 1109 (λ = 532.260 nm) (Baumgarten, 2010). This frequency stability was found to be better than 6 MHz over three years, and for an exemplary day in January 2009 we found 200 kHz over 24 h. Nevertheless, the ...
A Thermodynamic History of the Solar Constitution — II
... atmosphere. We can understand what happens to these carbon vapors by the analogous case of the familiar clouds in our own skies. . . We can now understand what happens as the buoyant carbon vapors soar upwards through the Sun’s atmosphere. They attain at last to an elevation where the fearful intens ...
... atmosphere. We can understand what happens to these carbon vapors by the analogous case of the familiar clouds in our own skies. . . We can now understand what happens as the buoyant carbon vapors soar upwards through the Sun’s atmosphere. They attain at last to an elevation where the fearful intens ...
1. INTRODUCTION
... as these stars often show several distinct stochastic events. We have focused our analysis on young, active stars that do not display rotationally modulated light curves and that can be considered as single X-ray sources. Some stars in the sample are detected or known binary systems, in which only o ...
... as these stars often show several distinct stochastic events. We have focused our analysis on young, active stars that do not display rotationally modulated light curves and that can be considered as single X-ray sources. Some stars in the sample are detected or known binary systems, in which only o ...
Testing Models of Coronal Heating, X
... Solar wind: connectivity to the corona • 1958: Eugene Parker proposed that the hot corona provides enough gas pressure to counteract gravity and accelerate a “solar wind.” 1962: Mariner 2 saw it! ...
... Solar wind: connectivity to the corona • 1958: Eugene Parker proposed that the hot corona provides enough gas pressure to counteract gravity and accelerate a “solar wind.” 1962: Mariner 2 saw it! ...
disappearance of comet c/2010 x1 (elenin): gone with a whimper
... from the scatter of 10 individual measurements of field stars. 2.2. STEREO Heliospheric Imagers The comet was detected during both regular and targeted observations by the Heliospheric Imagers (HI) on board the twin solar spacecraft STEREO A and B (Eyles et al. 2009). On each spacecraft, HI is equipp ...
... from the scatter of 10 individual measurements of field stars. 2.2. STEREO Heliospheric Imagers The comet was detected during both regular and targeted observations by the Heliospheric Imagers (HI) on board the twin solar spacecraft STEREO A and B (Eyles et al. 2009). On each spacecraft, HI is equipp ...
george ellery hale - National Academy of Sciences
... of State and Washington Streets which was destroyed in the great fire of 1871. During its reconstruction the possibilities of hydraulic elevators attracted him greatly, and in partnership with his brother George W. Hale he established the firm of William E. Hale and Company to manufacture and instal ...
... of State and Washington Streets which was destroyed in the great fire of 1871. During its reconstruction the possibilities of hydraulic elevators attracted him greatly, and in partnership with his brother George W. Hale he established the firm of William E. Hale and Company to manufacture and instal ...
Volatiles in protoplanetary disks
... a young pre-main sequence star. The gas-rich disk persists during planetesimal and giant planet formation, but not necessarily during the final assembly of terrestrial planets. During the lifetime of a protoplanetary disk, both solidand gas-phase chemistry is active, shaping the initial composition ...
... a young pre-main sequence star. The gas-rich disk persists during planetesimal and giant planet formation, but not necessarily during the final assembly of terrestrial planets. During the lifetime of a protoplanetary disk, both solidand gas-phase chemistry is active, shaping the initial composition ...
Volatiles in protoplanetary disks
... a young pre-main sequence star. The gas-rich disk persists during planetesimal and giant planet formation, but not necessarily during the final assembly of terrestrial planets. During the lifetime of a protoplanetary disk, both solidand gas-phase chemistry is active, shaping the initial composition ...
... a young pre-main sequence star. The gas-rich disk persists during planetesimal and giant planet formation, but not necessarily during the final assembly of terrestrial planets. During the lifetime of a protoplanetary disk, both solidand gas-phase chemistry is active, shaping the initial composition ...
The Neptune Trojans: a window on the birth of the solar system
... Horner, Lykawka: Neptune Trojans lifetime of the solar system, and so no Trojans should be expected for those planets. For Neptune, however, it seemed that these regions could host a stable population of small bodies. However, until the turn of the millennium, none had been found – a case where the ...
... Horner, Lykawka: Neptune Trojans lifetime of the solar system, and so no Trojans should be expected for those planets. For Neptune, however, it seemed that these regions could host a stable population of small bodies. However, until the turn of the millennium, none had been found – a case where the ...
Contrast analysis between the trajectory of the planetary system and
... are rarely uniform. Figure 2 shows the planet juncture index and change rate of the planetary system. Figure 2A1 shows that the planet juncture index lasts for 1000 years from 1000 to 2000 AD. The diagram shows that the periodic trend of the planet juncture index is relatively obvious. Among the sig ...
... are rarely uniform. Figure 2 shows the planet juncture index and change rate of the planetary system. Figure 2A1 shows that the planet juncture index lasts for 1000 years from 1000 to 2000 AD. The diagram shows that the periodic trend of the planet juncture index is relatively obvious. Among the sig ...
Chaos in the Solar System
... Sun, in neighborhood of Pluto. Their stability is also discussed in this review. In contrast, long period comets are thought to come from the Oort Cloud at 20,000 AU. They are perturbed into the inner solar system by stellar encounters or by the tidal field of the galaxy. These mechanisms differ fro ...
... Sun, in neighborhood of Pluto. Their stability is also discussed in this review. In contrast, long period comets are thought to come from the Oort Cloud at 20,000 AU. They are perturbed into the inner solar system by stellar encounters or by the tidal field of the galaxy. These mechanisms differ fro ...
Advanced Composition Explorer
Advanced Composition Explorer (ACE) is a NASA Explorers program Solar and space exploration mission to study matter comprising energetic particles from the solar wind, the interplanetary medium, and other sources. Real-time data from ACE is used by the NOAA Space Weather Prediction Center to improve forecasts and warnings of solar storms. The ACE robotic spacecraft was launched August 25, 1997 and entered a Lissajous orbit close to the L1 Lagrangian point (which lies between the Sun and the Earth at a distance of some 1.5 million km from the latter) on December 12, 1997. The spacecraft is currently operating at that orbit. Because ACE is in a non-Keplerian orbit, and has regular station-keeping maneuvers, the orbital parameters at right are only approximate. The spacecraft is still in generally good condition in 2015, and is projected to have enough fuel to maintain its orbit until 2024. NASA Goddard Space Flight Center managed the development and integration of the ACE spacecraft.