ASTR 330: The Solar System Dr Conor Nixon Fall 2006
... makes it one of the darkest surfaces in the solar system. • Study seems to indicate that the dark surface coloring can be matching well with a carbon-nitrogen-hydrogen organic compound, with a frosting of ice. • The organic substance may be akin to the dark surfaces of Pholus (a centaur comet), some ...
... makes it one of the darkest surfaces in the solar system. • Study seems to indicate that the dark surface coloring can be matching well with a carbon-nitrogen-hydrogen organic compound, with a frosting of ice. • The organic substance may be akin to the dark surfaces of Pholus (a centaur comet), some ...
THEMIS-SST
... – Every attempt was made to keep electron beam flux constant with energy. – Max electron energy was typically limited to ~40-44 keV due to unexpected discharges within the electron gun at higher voltages. – Prelaunch geometric factor was determined by calculation based on collimator acceptance angle ...
... – Every attempt was made to keep electron beam flux constant with energy. – Max electron energy was typically limited to ~40-44 keV due to unexpected discharges within the electron gun at higher voltages. – Prelaunch geometric factor was determined by calculation based on collimator acceptance angle ...
Phase Partitioning of NH3 and Gas to Particle Conversion
... in the NH 3 concentrations were out of phase with peaks of NH4+ concentrations, possibly because of local NH 3 emission from fertilized farmland. The drastic change of PF from nearly 0 to almost 1 during March 23–24 was attributed to a rapid and large variation of NH4+. The NH3 concentrations were a ...
... in the NH 3 concentrations were out of phase with peaks of NH4+ concentrations, possibly because of local NH 3 emission from fertilized farmland. The drastic change of PF from nearly 0 to almost 1 during March 23–24 was attributed to a rapid and large variation of NH4+. The NH3 concentrations were a ...
1 solar and stellar abundances of the elements
... ASTRONOMERS,nuclear physicists, and cosmologists have long sought to determine the "cosmic" abundances of the elements, i.e. the chemical composition of stars and gaseous nebulae in our part of the galaxy. In this contribution we shall be especially concerned with the composition of the sun which pr ...
... ASTRONOMERS,nuclear physicists, and cosmologists have long sought to determine the "cosmic" abundances of the elements, i.e. the chemical composition of stars and gaseous nebulae in our part of the galaxy. In this contribution we shall be especially concerned with the composition of the sun which pr ...
CHAPTER 14
... 2. Two types of pulsating stars are especially important to astronomers because they can be used as distance indicators: the Cepheid variables (with periods between 1 and 100 days) and the RR Lyrae variables (with periods shorter than one day). 3. The oscillations of the star’s outer layers result f ...
... 2. Two types of pulsating stars are especially important to astronomers because they can be used as distance indicators: the Cepheid variables (with periods between 1 and 100 days) and the RR Lyrae variables (with periods shorter than one day). 3. The oscillations of the star’s outer layers result f ...
Notes 3 - 1 Notes 3: Formation of the solar system 3.1 Starting
... Generally hydrogen, and helium are found in atomic form (as individual atoms), though hydrogen can also be found commonly as H2, it is usually most often observed in the galaxy as H I (neutral atomic form). Hydrogen and helium are thought to be originally from the Big Bang rather than as by-products ...
... Generally hydrogen, and helium are found in atomic form (as individual atoms), though hydrogen can also be found commonly as H2, it is usually most often observed in the galaxy as H I (neutral atomic form). Hydrogen and helium are thought to be originally from the Big Bang rather than as by-products ...
======= SPIRIT 2
... Asteroidal bodies are rocky and are smaller than 250 km in diameter. Physical The physical characteristics of celestial bodies are things like distance to the sun, radius, gravity, mass, density, volume, rotational period, revolution period, atmosphere, moons, tilt of axis, max/min temperatures, etc ...
... Asteroidal bodies are rocky and are smaller than 250 km in diameter. Physical The physical characteristics of celestial bodies are things like distance to the sun, radius, gravity, mass, density, volume, rotational period, revolution period, atmosphere, moons, tilt of axis, max/min temperatures, etc ...
The Earth in the Solar System
... The most widely accepted cosmogonical (formation) theory is that of V. Safronov, who was the first to hypothesize that the solar system initially accreted from a nebular cloud that evolved from a sphere to a disk. While details of solar system formation models differ, a common premise is that the plan ...
... The most widely accepted cosmogonical (formation) theory is that of V. Safronov, who was the first to hypothesize that the solar system initially accreted from a nebular cloud that evolved from a sphere to a disk. While details of solar system formation models differ, a common premise is that the plan ...
UVIS Team Meeting - Laboratory for Atmospheric and Space Physics
... WAVELENGTHS ARE ENHANCED LBH first vector -LBH band system extends from 1250-2600 A -complicated system (mag dipole+ electric quadrupole uused lab spectra at high resolution to convolve with UVIS 5A FWHM -strongest 1300-1500A ~ as PE flux ie solar XUV -source of Space Weather on Nitrogen bearing pla ...
... WAVELENGTHS ARE ENHANCED LBH first vector -LBH band system extends from 1250-2600 A -complicated system (mag dipole+ electric quadrupole uused lab spectra at high resolution to convolve with UVIS 5A FWHM -strongest 1300-1500A ~ as PE flux ie solar XUV -source of Space Weather on Nitrogen bearing pla ...
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.