標(biāo)題: Titlebook: Bioastronomy - The Next Steps; Proceedings of the 9 George Marx Conference proceedings 1988 Kluwer Academic Publishers 1988 Astrometry.astr [打印本頁] 作者: MOTE 時(shí)間: 2025-3-21 19:04
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作者: avulsion 時(shí)間: 2025-3-21 22:02
Water: An Absolute Requirement for Lifeentropy materials from and puts out high-entropy ones into the environment; for living beings to be able to maintain their lives, the environment itself has to be kept in a low-entropy state. As the environment of the living beings, the Earth has a mechanism of entropy elimination, the .. Living bei作者: Choreography 時(shí)間: 2025-3-22 02:24
Europa: The Prospects for an Oceanwn solar system, Europa, one of the Galilean satellites of Jupiter, may have such an ocean. Both theoretical calculations and certain observations support its existence, although proof is lacking. The putative ocean would probably have temperatures, pressures, and chemistry conducive to biologic act作者: 拾落穗 時(shí)間: 2025-3-22 08:15 作者: offense 時(shí)間: 2025-3-22 10:00 作者: jarring 時(shí)間: 2025-3-22 15:15
The Galactic Belt of Intelligent LifeThey treat our Galaxy as a homogeneous, isotropic and steady-state system and not as an object of specific geometric and kinematic properties with reasonably well understood morphology and path of evolution. If we assume that the case of mankind is about average and accept the idea that the longevit作者: Antarctic 時(shí)間: 2025-3-22 17:20 作者: BOAST 時(shí)間: 2025-3-22 23:45 作者: Mere僅僅 時(shí)間: 2025-3-23 01:25 作者: 發(fā)誓放棄 時(shí)間: 2025-3-23 07:09
A Radial Velocity Search for Extrasolar Planetsstrument is an optical spectrometer for which wavelengths are first calibrated by transmission through a tunable Fabry-Perot etalon interferometer. The intrinsic stability of the etalon and an image-scrambling fiber optic light feed provide great sensitivity to line-of-sight accelerations and immuni作者: Inexorable 時(shí)間: 2025-3-23 13:12 作者: erythema 時(shí)間: 2025-3-23 15:11
Progress in Determining the Space Orientation of Starssion and observational procedure with which this theory can be tested. Presently available data is presented, and observing stars are outlined. The importance of this determination to the methods of detecting extrasolar planetary systems is further developed, and a few examples are given.作者: Climate 時(shí)間: 2025-3-23 20:43 作者: 左右連貫 時(shí)間: 2025-3-24 01:35
Systematic Aspects of Direct Extrasolar Planet Detectionckground of diffracted and scattered starlight. The very long exposure time required to achieve an adequate signal-to-noise ratio will make their detection infeasible. For a future telescope, a 16-fold increase in either the smoothness or the collecting area of the optics would reduce the exposure t作者: 真實(shí)的你 時(shí)間: 2025-3-24 06:01 作者: aquatic 時(shí)間: 2025-3-24 09:48 作者: 越自我 時(shí)間: 2025-3-24 14:28
The Joel Test: 12 Steps to Better Codeime to a tolerable value, but the contrast would remain low and the required photometric precision high. In this situation, the feasibility of detection would be contingent on the careful identification and control of systematic errors.作者: 和平主義者 時(shí)間: 2025-3-24 16:48
W. M. Goss,Claire Hooker,Ronald D. Ekersof stellar radial velocity and positional perturbations. Each method has advantages and is effective at detecting different kinds of planets. The fundamental questions in this field should be answered during the next decade.作者: dissent 時(shí)間: 2025-3-24 20:46
Planetary Detection Techniques: An Overviewof stellar radial velocity and positional perturbations. Each method has advantages and is effective at detecting different kinds of planets. The fundamental questions in this field should be answered during the next decade.作者: set598 時(shí)間: 2025-3-25 02:05
Water: An Absolute Requirement for Lifengs have two kinds of low-entropy materials, clean liquid water of low energy, and carbohydrate of high energy. .. Water is absolutely important for life not only as the place where the elementary bio-process proceed, but also as the low-energy and low-entropy material indispensable for entropy elimination from the concerned living system.作者: 物種起源 時(shí)間: 2025-3-25 03:46
A Search for Planetary Mass Companions to Nearby Starsve been previously detected by conventional astrometry. Companions of a few Jupiter masses are implied. Since brown dwarfs of 10–80 Jupiter masses are either rare or non-existent, these companions probably represent the tip of the planetary mass spectrum.作者: ROOF 時(shí)間: 2025-3-25 11:29 作者: 刪減 時(shí)間: 2025-3-25 15:08
https://doi.org/10.1007/978-3-663-10427-83 10. years our civilization will enter the Perseus arm. It can be expected that in the Galaxy the ratio of the probable number of civilizations at a higher than ours — technological level to that at a lower technological level is of the order of 0, 7.作者: hardheaded 時(shí)間: 2025-3-25 17:20
The Million Degree Solar Corona, 1945–1946sA, and . Lyr) indicate central depleted regions with radii of order 20 AU. One possible explanation for maintenance of the depleted regions is that a planet orbits at and defines each cloud’s inner boundary, sweeping up particles entering this region.作者: angina-pectoris 時(shí)間: 2025-3-25 22:46 作者: 鳥籠 時(shí)間: 2025-3-26 03:47
Iras Statistics on Main Sequence Stellar IR Excesses and Models of Circumstellar Particle CloudssA, and . Lyr) indicate central depleted regions with radii of order 20 AU. One possible explanation for maintenance of the depleted regions is that a planet orbits at and defines each cloud’s inner boundary, sweeping up particles entering this region.作者: 條約 時(shí)間: 2025-3-26 05:42
Foreign Investment and American Jobs,rrestrial organisms, origin of life under such conditions seems unlikely. In other solar systems, however, larger satellites with more significant heat flow could provide environments that are stable over an order of aeons and in which life could perhaps evolve.作者: 平庸的人或物 時(shí)間: 2025-3-26 10:54
La Transmission du Texte de Jocundus, study of observational data on the rotation of the dark cores in molecular clouds shows that a fraction from 10. up to ≥ O.l of all clouds have the appropriate angular momenta. Thus, a fraction of stars having the planetary systems can amount to o.l of all stars of solar mass in the Galaxy.作者: 慷慨援助 時(shí)間: 2025-3-26 15:18 作者: 懸崖 時(shí)間: 2025-3-26 19:41
Europa: The Prospects for an Oceanrrestrial organisms, origin of life under such conditions seems unlikely. In other solar systems, however, larger satellites with more significant heat flow could provide environments that are stable over an order of aeons and in which life could perhaps evolve.作者: abject 時(shí)間: 2025-3-27 00:46
Distribution Of Planetary Systems study of observational data on the rotation of the dark cores in molecular clouds shows that a fraction from 10. up to ≥ O.l of all clouds have the appropriate angular momenta. Thus, a fraction of stars having the planetary systems can amount to o.l of all stars of solar mass in the Galaxy.作者: 啤酒 時(shí)間: 2025-3-27 04:41 作者: 基因組 時(shí)間: 2025-3-27 06:25 作者: 大看臺(tái) 時(shí)間: 2025-3-27 10:50 作者: gentle 時(shí)間: 2025-3-27 15:57
Progress in Determining the Space Orientation of Starssion and observational procedure with which this theory can be tested. Presently available data is presented, and observing stars are outlined. The importance of this determination to the methods of detecting extrasolar planetary systems is further developed, and a few examples are given.作者: Heterodoxy 時(shí)間: 2025-3-27 20:43
https://doi.org/10.1007/978-94-009-2959-3Astrometry; astronomy; galaxy; optical interferometry; stars作者: Acetaminophen 時(shí)間: 2025-3-28 00:46 作者: ascend 時(shí)間: 2025-3-28 04:27 作者: 招致 時(shí)間: 2025-3-28 07:18 作者: malapropism 時(shí)間: 2025-3-28 11:18
Foreign Investment and American Jobs,wn solar system, Europa, one of the Galilean satellites of Jupiter, may have such an ocean. Both theoretical calculations and certain observations support its existence, although proof is lacking. The putative ocean would probably have temperatures, pressures, and chemistry conducive to biologic act作者: 頭盔 時(shí)間: 2025-3-28 15:01
La Transmission du Texte de Jocundus, a result of collapse of a cloud which angular momentum J is small enough to form a star-like core of minimal mass in the center of the cloud. However, the angular momentum must exceed the maximal angular momentum admissible for the formation of a single star. This puts the following limits on the c作者: Aggressive 時(shí)間: 2025-3-28 20:36 作者: 輕快帶來危險(xiǎn) 時(shí)間: 2025-3-28 23:04
https://doi.org/10.1007/978-1-349-17565-9They treat our Galaxy as a homogeneous, isotropic and steady-state system and not as an object of specific geometric and kinematic properties with reasonably well understood morphology and path of evolution. If we assume that the case of mankind is about average and accept the idea that the longevit作者: hypertension 時(shí)間: 2025-3-29 05:04 作者: 斥責(zé) 時(shí)間: 2025-3-29 11:15 作者: 調(diào)整 時(shí)間: 2025-3-29 15:04
W. M. Goss,Claire Hooker,Ronald D. Ekerss. The average external error of the velocities is 13 meters per second, and the observed variations are in the range 25–65 m s.. The trends in the velocities imply periods of more than ~10 years, but these cannot be due to brown dwarf-mass companions in very long period orbits, since these would ha作者: 去才蔑視 時(shí)間: 2025-3-29 17:31 作者: regale 時(shí)間: 2025-3-29 22:21 作者: 嘮叨 時(shí)間: 2025-3-30 03:51
W. M. Goss,Claire Hooker,Ronald D. Ekerssion and observational procedure with which this theory can be tested. Presently available data is presented, and observing stars are outlined. The importance of this determination to the methods of detecting extrasolar planetary systems is further developed, and a few examples are given.作者: 現(xiàn)暈光 時(shí)間: 2025-3-30 04:30
https://doi.org/10.1007/978-1-4302-0753-5s the stellar disk. The magnitude of this reduction is proportional to the ratio of the planet’s area to that of the star. For the solar system, the decrease in light amounts to 0.01 per cent for terrestrial-sized planets. To overcome the effects of scintillation and variable extinction in the Earth作者: inquisitive 時(shí)間: 2025-3-30 08:30
The Joel Test: 12 Steps to Better Codeckground of diffracted and scattered starlight. The very long exposure time required to achieve an adequate signal-to-noise ratio will make their detection infeasible. For a future telescope, a 16-fold increase in either the smoothness or the collecting area of the optics would reduce the exposure t作者: 苦惱 時(shí)間: 2025-3-30 16:00 作者: gene-therapy 時(shí)間: 2025-3-30 18:04
Bioastronomy - The Next Steps978-94-009-2959-3Series ISSN 0067-0057 Series E-ISSN 2214-7985 作者: nascent 時(shí)間: 2025-3-30 21:00 作者: ethereal 時(shí)間: 2025-3-31 02:16
Occupational Education and Training,inous romantic science fiction, and a vast body of technical literature. Thousands of articles and books, mostly in the last two decades have accumulated. This is largely due to the data returned from the dozen spacecraft sent between 1964 and 1975. Automated spacecraft data have been returned as late as 1982.作者: 協(xié)定 時(shí)間: 2025-3-31 08:29 作者: 煩擾 時(shí)間: 2025-3-31 11:27 作者: CULP 時(shí)間: 2025-3-31 16:17
Empirischer Teil: Qualitative Studie,The layer with T = 300 K and density 0.07 g cm in Uranus (and may be Neptune) atmosphere in is the most suitab1e extraterrestrial 1ocations in the So1ar system for the origin and sustentation of 1ife. The high density of CH., NH., NH.HS, H.O etc, the presence of water drops and electrical discharges facilitate the emergence of life.作者: 事先無準(zhǔn)備 時(shí)間: 2025-3-31 19:10
https://doi.org/10.1007/978-3-658-21128-8In this paper an overview is given about the most interesting physical and chemical properties of the nucleus of Comet Halley learned from the VEGA space mission.作者: 反感 時(shí)間: 2025-4-1 00:23
