標(biāo)題: Titlebook: Visually Observing Comets; David A. J. Seargent Book 2017 Springer International Publishing Switzerland 2017 Amateur comet-hunting.How to [打印本頁(yè)] 作者: 遠(yuǎn)見 時(shí)間: 2025-3-21 16:44
書目名稱Visually Observing Comets影響因子(影響力)
作者: foreign 時(shí)間: 2025-3-21 20:46 作者: inveigh 時(shí)間: 2025-3-22 04:28
David A. J. Seargentring. We show that these systems evolve, at low temperature, from a canted antiferromagnetic state (CAF) towards an insulating ferromagnetic state (FI), approaching the metallic transition (.. =0.22 and ... 0.17). For .. and ... 0.125, we observe magnetic elastic diffuse scattering characteristic of作者: Highbrow 時(shí)間: 2025-3-22 05:18
David A. J. Seargenty have been the principal aetiologic factors examined. The incidence is estimated at 0.01% of children at risk per year and the prevalence at 0.2–1 case per 100 000 children. Active controversy surrounds the correct terminology for the disease. Still’s disease applies to only one variant of the diso作者: canonical 時(shí)間: 2025-3-22 12:17 作者: creatine-kinase 時(shí)間: 2025-3-22 15:52
‘Public Health Risks of Exposure to Asbestos‘ (EUR 5653e )1. This report contained several conclusions and recommendations; one of the latter stated that ‘a(chǎn) mesothelioma register should be set up in those countries of the EEC where none exist, in accordance with criteria and procedures agreed upon 作者: MULTI 時(shí)間: 2025-3-22 18:19 作者: CYN 時(shí)間: 2025-3-23 00:58
David A. J. Seargenthe aim of this book is to assist those doctors undertaking minor surgery in their Practices. It is intended to present a practical, clear and concise text. This is accompanied by easy to follow illustrations. The contents of the book are governed by two considerations. Firstly, it covers only those 作者: PANIC 時(shí)間: 2025-3-23 04:38 作者: FECK 時(shí)間: 2025-3-23 06:41
David A. J. Seargentce for all physicians tions can, of course, only be of a general nature in an dealing with patients suffering from exotic skin diseases atlas such as this. The practising physician is therefore and for medical staff working in tropical and sub- recommended to consult pertinent standard texts and gui作者: Cytokines 時(shí)間: 2025-3-23 10:04 作者: 發(fā)源 時(shí)間: 2025-3-23 16:57 作者: anaerobic 時(shí)間: 2025-3-23 18:02 作者: 保存 時(shí)間: 2025-3-24 01:50 作者: Ballerina 時(shí)間: 2025-3-24 04:28
David A. J. Seargent7) were measured by increment threshold techniques in patients suffering from acquired colour vision deficiencies, caused either by drugs or by hereditary retinal degenerations. Compared with normal observers (n =11) Diphenylbutylpiperidine (IMAP?, 1.5mg/week over 18 months) reversibly decreases the作者: packet 時(shí)間: 2025-3-24 10:06 作者: Nonconformist 時(shí)間: 2025-3-24 14:14
Comets in Motion was able to show that the bright comet that had graced the morning skies during November and early December of 1680 was actually the same as the even more magnificent apparition that emerged from the evening twilight just prior to Christmas. He also correctly demonstrated that this comet had passed unusually close to the Sun around mid-month.作者: CHANT 時(shí)間: 2025-3-24 15:01
The Formation of Tails to a distance equal to that of Earth and the Sun, while ions from the tail of Comet Hyakutake in 1996 were detected by spacecraft at over 3 times that distance from the comet’s head. Then, in 2007, the great Comet McNaught extended a magnificent tail as long as that of Ikeya-Seki but around 65 million km wide!作者: 免費(fèi) 時(shí)間: 2025-3-24 22:13
The Value of Visual Observing in a Photo-Happy World comet seen today with one seen in decades, centuries or even millennia past. Only by comparing visual observations of a periodic comet during a contemporary return can we ascertain whether any changes in that object’s activity have taken place since astronomers of a century ago described that same body during its earlier apparitions.作者: Abutment 時(shí)間: 2025-3-25 02:49
The Kreutz Sungrazing Comet Group: A Special Opportunity for Visual Comet Hunters?orbit had been calculated, it was found to have passed an incredibly close 0.005 AU from the center of the Sun. At its closest approach, it was actually closer to the solar photosphere than the tops of some of the prominences!作者: Gratulate 時(shí)間: 2025-3-25 06:31
Visual Comet Hunting it was a rare year that did not bring forth several comets discovered by amateur astronomers systematically sweeping the skies with wide-field telescopes or large binoculars. The typical magnitude of these comets at the time of their discovery was between 8 and 10, relatively bright on the scale of telescopic objects.作者: 令人不快 時(shí)間: 2025-3-25 11:33
Some Prominent Visual Comet Discoverersastronomers to the gentle sport of visual comet hunting for over two centuries, and happily, despite the growth of automated sky patrols using relatively large telescopes fitted with CCD technology, the tradition continues today.作者: malapropism 時(shí)間: 2025-3-25 14:14
2198-0756 or use as an on-the-go-reference.Explains the possibilities .In these days of computers and CCD cameras, visual comet observers can still contribute scientifically useful data with the help of this handy reference for use in the field.?Comets are one of the principal areas for productive pro-amateur作者: 創(chuàng)新 時(shí)間: 2025-3-25 19:25 作者: 音樂戲劇 時(shí)間: 2025-3-25 22:45 作者: chlorosis 時(shí)間: 2025-3-26 00:24 作者: Sinus-Node 時(shí)間: 2025-3-26 08:08
Toward the Modern Understanding of Cometser than completely torn away. The nature of these strange objects appeared to defy a simple explanation. They clearly were not solid bodies, like the planets, nor were they similar to the Sun and other stars. Even though the heads of some comets looked relatively dense, the fact that stars were most作者: 憤憤不平 時(shí)間: 2025-3-26 09:56 作者: lymphoma 時(shí)間: 2025-3-26 15:49 作者: corporate 時(shí)間: 2025-3-26 20:39
The Value of Visual Observing in a Photo-Happy Worldd are very relevant in the case of comet observing. For one thing, visual observations link today’s comet observers with the line of their predecessors stretching back to the days of ancient China and Greece over 2000 years ago. Only by comparing visual descriptions can we relate the appearance of a作者: 撫育 時(shí)間: 2025-3-26 23:50
Visual Comet Huntingover 5 years have passed since the latest visual discovery of a comet. This is strikingly different from the situation prior to about 1995. Back then, it was a rare year that did not bring forth several comets discovered by amateur astronomers systematically sweeping the skies with wide-field telesc作者: 繼承人 時(shí)間: 2025-3-27 02:26
Observing Known Cometser. Each year brings its stock of returning periodic and newly discovered non-periodic comets, and most of the time there will be some “known” comet within the visual range of small or moderately sized telescopes. To some, the routine observation of a dim comet might appear dull fare, but it is prec作者: 溫順 時(shí)間: 2025-3-27 06:27
The Coma: How to Estimate Its Brightness and Record Its Featurest-period comets is essential in determining changes that may occur over time, and contemporary visual observation is the only safe way of comparing the brightness of a periodic comet as it appears today with the observations of yesteryear. Moreover, brightness estimates of long-period comets tell us作者: Radiation 時(shí)間: 2025-3-27 10:31 作者: occult 時(shí)間: 2025-3-27 17:13
29P/Schwassmann-Wachmann, an “Outbursting” Comet to Watchunusual happens!), but because it moves in an almost circular orbit between the giant outer planets Jupiter and Saturn it is, like these planets, accessible every year throughout its orbit. Most of the time, it will appear as nothing more than a speck of light between magnitudes 17 and 18, out of th作者: 幾何學(xué)家 時(shí)間: 2025-3-27 19:38
Some Prominent Visual Comet Discoverersen to that object and will remain in the catalogs of cometary apparitions long after the comet itself has faded from view. These ambitions have drawn astronomers to the gentle sport of visual comet hunting for over two centuries, and happily, despite the growth of automated sky patrols using relativ作者: Tractable 時(shí)間: 2025-3-28 01:37 作者: 錯(cuò)誤 時(shí)間: 2025-3-28 05:26 作者: 博識(shí) 時(shí)間: 2025-3-28 07:11
Observing Known Cometsdow through which their physical nature may be glimpsed. It is also through regular estimates of a comet’s brightness and general appearance that any unexpected departure from its regular behavior (a sudden brightening or fading, for example) becomes apparent and may give clues as to the future development of the comet in question.作者: JEER 時(shí)間: 2025-3-28 12:13 作者: lattice 時(shí)間: 2025-3-28 16:44
29P/Schwassmann-Wachmann, an “Outbursting” Comet to Watchehavior, there will no doubt be many occasions when it will be an easy object for telescopes having apertures of just one quarter of that diameter, and it is this that makes comet 29P such a fascinating object for visual observers (Fig. 14.1).作者: Compatriot 時(shí)間: 2025-3-28 20:06 作者: Felicitous 時(shí)間: 2025-3-28 23:17
2198-0756 o what to look for in comet heads and tails.. .Details are also given of 20 periodic comets, predicted to return between the years 2017 and 2027, that are expected to become suitable targets for visual observin978-3-319-45434-4978-3-319-45435-1Series ISSN 2198-0756 Series E-ISSN 2198-0764 作者: 粘 時(shí)間: 2025-3-29 07:07 作者: BUCK 時(shí)間: 2025-3-29 10:26
eneral practitioners with up-to-date useful information, has sponsored the production of this series of publi- cations on organbased cancers, especially written for general practitioners. Regis Malbois Advisor in charge of the "Europe against Cancer" programme Commission of the European Communities Brussels P978-3-540-56702-8978-3-642-78225-1作者: 后天習(xí)得 時(shí)間: 2025-3-29 14:29
David A. J. Seargenthe same q-dependent intensity, ... 0.125 is a limit case where the (CAF) state and the diffuse scattering disappear. In the compounds with .. = 0.20 and ... 0.125, an intriguing insulating and ferromagnetic (FI) phase occurs at low temperature. The superstructure Bragg peaks at .. = (0, 0, .)., typi作者: 遷移 時(shí)間: 2025-3-29 19:35
David A. J. Seargention and seropositivity for IgM rheumatoid factor are unusual in JCA, and at initial presentation large joints tend to be involved more prominently than small joints (. rheumatoid arthritis). Furthermore, iritis and pericarditis are relatively common in JCA, compared to rheumatoid arthritis.作者: OTTER 時(shí)間: 2025-3-29 22:54
David A. J. Seargentfraction of the still contractile section. Survival was reported to be 100% or 90% if this ejection fraction surpassed 45% or 39% respectively (Watson .., 1975; Kapelanski .., 1978). Surgical mortality is higher if a revascularization procedure has to be added to the aneurysmectomy (Burton ., 1979).作者: 排他 時(shí)間: 2025-3-30 03:41 作者: 地牢 時(shí)間: 2025-3-30 04:53 作者: expire 時(shí)間: 2025-3-30 12:17 作者: 溫室 時(shí)間: 2025-3-30 16:04 作者: figurine 時(shí)間: 2025-3-30 17:36 作者: 推延 時(shí)間: 2025-3-31 00:02
David A. J. Seargenttern in which wounds may be different so far as the police are concerned. For this, arranged can provide much information about the ways and other reasons, a detailed knowledge of wounds and in which they have been caused. For example, the wounding is an essential part of medical training. grouping and positi978-94-010-8328-7978-94-009-4123-6作者: 高度贊揚(yáng) 時(shí)間: 2025-3-31 02:45
nd of the book. The chemistry of colouring matters can be regarded as a branch of pure chemistry, but the development of knowledge in this field has followed a course determined chiefly by the applications of dyes and pigments. It has therefore appeared appropriate to treat the subject here as a bra作者: MAZE 時(shí)間: 2025-3-31 08:10
David A. J. Seargentwas concluded that this was the blue cone ERG. It had both an a- and b-wave, the latter being much larger (5 microvolts). At mesopic levels (yellow background) the early ‘blue’ cone ERG produced by blue light was not followed by the slower rod response known to be elicited by this blue stimulus (see作者: Credence 時(shí)間: 2025-3-31 09:50 作者: Ancestor 時(shí)間: 2025-3-31 16:01 作者: SIT 時(shí)間: 2025-3-31 18:34
978-3-319-45434-4Springer International Publishing Switzerland 2017作者: laxative 時(shí)間: 2025-3-31 23:32
