Ons sonnestelsel is geskape
... “...these theories fail to describe the formation of gas giant planets in a satisfactory way. Gravitational interaction between the gaseous protoplanetary disc and the massive planetary cores causes them to move rapidly inward over about 100 000 years in what we call the ‘migration’ of the planet in ...
... “...these theories fail to describe the formation of gas giant planets in a satisfactory way. Gravitational interaction between the gaseous protoplanetary disc and the massive planetary cores causes them to move rapidly inward over about 100 000 years in what we call the ‘migration’ of the planet in ...
Grand Minima of Solar Activity and the Mean
... their phase and frequency remain locked is important for understanding the physical nature of Grand Minima. There is some evidence that the solar cycle continued, at least in some form, inside the Maunder Minimum. Solar, geomagnetic, and heliospheric activities were dominated by the 22-year cycle (U ...
... their phase and frequency remain locked is important for understanding the physical nature of Grand Minima. There is some evidence that the solar cycle continued, at least in some form, inside the Maunder Minimum. Solar, geomagnetic, and heliospheric activities were dominated by the 22-year cycle (U ...
Simulation of Irradiated Si Detectors
... Both bulk and surface damages take place during the hadron irradiation of Si sensors Simultaneous incorporations of bulk damage and surface damage is essential for correct interpretation of observed radiation damage effects - Use of only bulk damage or only surface damage may lead to wrong concl ...
... Both bulk and surface damages take place during the hadron irradiation of Si sensors Simultaneous incorporations of bulk damage and surface damage is essential for correct interpretation of observed radiation damage effects - Use of only bulk damage or only surface damage may lead to wrong concl ...
A cometary origin for martian atmospheric methane
... Investigators have reported methane in the martian atmosphere using a variety of analytical techniques, including Earth-based astronomical observations (K rasnopolsky et al., 1997, 2004; Mumma et al., 2009; Krasnopolsky, 2011), the Planetary Fourier Spectrometer on the ESA Mars Express mission (For ...
... Investigators have reported methane in the martian atmosphere using a variety of analytical techniques, including Earth-based astronomical observations (K rasnopolsky et al., 1997, 2004; Mumma et al., 2009; Krasnopolsky, 2011), the Planetary Fourier Spectrometer on the ESA Mars Express mission (For ...
Fritz Hasenöhrl and E=mc2
... 1904 by Fritz Hasenöhrl. Using Abraham’s theory, Hasenöhrl showed that a cavity with perfectly reflecting walls behaves, if set in motion, as if it has a mass m given by m = 8V ε0 /3c2 , where V is the volume of the cavity, ε0 is the energy density at rest, and c is the velocity of light.” (For a m ...
... 1904 by Fritz Hasenöhrl. Using Abraham’s theory, Hasenöhrl showed that a cavity with perfectly reflecting walls behaves, if set in motion, as if it has a mass m given by m = 8V ε0 /3c2 , where V is the volume of the cavity, ε0 is the energy density at rest, and c is the velocity of light.” (For a m ...
Origin of homochirality in biological systems
... within a relatively short time : for a diluted aqueous solution of a simple triose this is within a day at 70–100 xC (Fedoroňko & Königstein 1969) in alkaline conditions. For L-amino acids, it takes much longer (Bada 1972), but is still a very short time compared with the time it must have taken t ...
... within a relatively short time : for a diluted aqueous solution of a simple triose this is within a day at 70–100 xC (Fedoroňko & Königstein 1969) in alkaline conditions. For L-amino acids, it takes much longer (Bada 1972), but is still a very short time compared with the time it must have taken t ...
pg. 271 - Cornell University
... the planetary nebulae (PNs) contribute to the enrichment of the interstellar medium. Spectroscopic studies of PNs are essential to better understand and quantify this enrichment. Until the launch of the Spitzer Space Telescope it was impossible to fully study PNs in the infrared outside the galaxy’s ...
... the planetary nebulae (PNs) contribute to the enrichment of the interstellar medium. Spectroscopic studies of PNs are essential to better understand and quantify this enrichment. Until the launch of the Spitzer Space Telescope it was impossible to fully study PNs in the infrared outside the galaxy’s ...
PDF only - at www.arxiv.org.
... Why is Earth a pale blue dot? Rayleigh scattering is strongest at short wavelengths and in transparent atmospheres without visible-‐light absorbers. Because Earth has a thick and largely ...
... Why is Earth a pale blue dot? Rayleigh scattering is strongest at short wavelengths and in transparent atmospheres without visible-‐light absorbers. Because Earth has a thick and largely ...
Classification of nucleic acids structures by means of the
... Finally, we have to consider the disordered structures or random coil [3]. In this case, there are no hydrogen bonds between the nitrogenated bases and, because of this, it is not possible the formation of ordered structures. The random coil is observed when the nucleic acids are in denaturating con ...
... Finally, we have to consider the disordered structures or random coil [3]. In this case, there are no hydrogen bonds between the nitrogenated bases and, because of this, it is not possible the formation of ordered structures. The random coil is observed when the nucleic acids are in denaturating con ...
cosmic-ray neon, wolf-rayet stars, and the superbubble origin of
... Ne/ 20 Ne ratios obtained by fitting data in each detector range and all ranges summed together. For each detector range the median energy and energy interval of the events detected for that detector range (the energy range encompasses 95% of the particles for that detector range) are calculated and ...
... Ne/ 20 Ne ratios obtained by fitting data in each detector range and all ranges summed together. For each detector range the median energy and energy interval of the events detected for that detector range (the energy range encompasses 95% of the particles for that detector range) are calculated and ...
Origin of Life
... In general arguments for a designer are arguments against the alternative. This does not mean these are just arguments against evolutionary theory. All arguments, by definition, are characterized by taking one side while arguing against another side. Arguments against a theory are about eliminating ...
... In general arguments for a designer are arguments against the alternative. This does not mean these are just arguments against evolutionary theory. All arguments, by definition, are characterized by taking one side while arguing against another side. Arguments against a theory are about eliminating ...
Geant4 Space Workshop - DNA
... R. Capra, S. Chauvie, Z. Francis, S. Guatelli, S. Incerti, B. Mascialino, Ph. Moretto, G. Montarou, P. Nieminen, Maria Grazia Pia ...
... R. Capra, S. Chauvie, Z. Francis, S. Guatelli, S. Incerti, B. Mascialino, Ph. Moretto, G. Montarou, P. Nieminen, Maria Grazia Pia ...
Observations
... Coordinated observations by both Cassini and Galileo offer the unique opportunity to simultaneously observe the solar wind and Jupiter’s magnetosphere. Cassini in situ measurements of the upstream solar wind conditions while Galileo is deep in Jupiter’s magnetosphere are planned during approach. Out ...
... Coordinated observations by both Cassini and Galileo offer the unique opportunity to simultaneously observe the solar wind and Jupiter’s magnetosphere. Cassini in situ measurements of the upstream solar wind conditions while Galileo is deep in Jupiter’s magnetosphere are planned during approach. Out ...
A Digital Microfluidic Method for Dried Blood Spot Analysis
... and the solvent is allowed to evaporate. The extract and standards are then derivatized, and the products are isolated by allowing the solvent to evaporate. The entire process requires 50 min to complete. Samples processed by method 1 were collected and analyzed off-line by nanoelectrospray ionizati ...
... and the solvent is allowed to evaporate. The extract and standards are then derivatized, and the products are isolated by allowing the solvent to evaporate. The entire process requires 50 min to complete. Samples processed by method 1 were collected and analyzed off-line by nanoelectrospray ionizati ...
ATP
... The main facts that form the basis of this hypothesis are: …and yet another hypothetical option ...
... The main facts that form the basis of this hypothesis are: …and yet another hypothetical option ...
EXPOSE
EXPOSE is a multi-user facility mounted outside the International Space Station dedicated to astrobiology. EXPOSE was developed by the European Space Agency (ESA) for long-term spaceflights and was designed to allow exposure of chemical and biological samples to outer space while recording data during exposure.The results will contribute to our understanding of photobiological processes in simulated radiation climates of planets (e.g. early Earth, early and present Mars, and the role of the ozone layer in protecting the biosphere from harmful UV-B radiation), as well as studies of the probabilities and limitations for life to be distributed beyond its planet of origin. EXPOSE data support long-term in situ studies of microbes in artificial meteorites, as well as of microbial communities from special ecological niches. Some EXPOSE experiments investigated to what extent particular terrestrial organisms are able to cope with extraterrestrial environmental conditions. Others tested how organic molecules react when subjected for a prolonged period of time to unfiltered solar light.