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Tytuł:
Rodziny asteroid
Asteroid families
Autorzy:
Leliwa-Kopystyński, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1818531.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwa Geofizyczne
Tematy:
asteroida
HCM
interloper
kraterowanie
rodzina asteroid
rozbicie zderzeniowe
asteroid
cratering
asteroid family
crash crash
Opis:
Liczba asteroid o wyznaczonych orbitach przekracza obecnie 500 tysięcy. Wiele z nich jest ze sobą powiązanych genetycznie, gdyż stanowią one produkt uszkodzenia lub nawet rozbicia większej asteroidy w procesie zderzeniowym. Podstawowy problem stanowi przypisanie (lub nie) danej asteroidy do określonej rodziny. Całkowicie jednoznacznej metody nie ma. W zbiorze asteroid potencjalnie tworzących rodzinę znajdują się zawsze obiekty „obce” (interlopery). Podstawowa metoda identyfikacji to HCM (Hierarchical Clustering Metod – metoda hierarchicznego grupowania). Rodziny zawierają od kilku asteroid do nawet około 30 tysięcy asteroid. Znanych rodzin jest około 100. Około 20-30% wszystkich asteroid to członkowie jakiejś rodziny.
Źródło:
Przegląd Geofizyczny; 2021, Z. 1-2; 3--20
0033-2135
Pojawia się w:
Przegląd Geofizyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ciała macierzyste meteorytów żelaznych jako złoża metali
Parent bodies of iron meteorites as metal ores deposits
Autorzy:
Przylibski, Tadeusz A.
Donhefner, Hubert
Łuszczek, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1032940.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
M-type asteroid
asteroid belt
chromium
deposit
iron meteorite
metal
Opis:
Some of M type asteroids, like 016 Psyche, 022 Kalliope, 055 Pandora, 110 Lydia, 250 Bettina, 347 Pariana, 678 Fredegundis, 771 Libera, 872 Holda, are probably the source of iron meteorites. The population of these asteroids is less than 10% of all minor bodies orbiting the Sun in the asteroid belt. In the paper we analyzed the concentrations of 19 selected metals in 1730 iron meteorites according to the groups. Base on it authors found out that beside Fe and Ni the parent bodies of iron meteorites are the richest in Co, Cu, Ge, Cr, and Ga. They are also rich in As, Pt, Mo, Os, Pd, and Ir. The iron meteorites of IVB group are the richest in metals. Meteorites belonging to this group contain the highest average concentrations of Ir, Co, W, Re, Pt, Os, Pd, Rh, Ru, Mo, and Ni. Meteorites from IAB group are the richest in Ge, As, Sb and Au. The parent bodies of iron meteorites, especially from IVB and IAB groups, can be recognized as very rich polymetallic deposits. The concentrations of most of 19 analyzed metals in iron meteorites are greater than the concentrations in Earth’s crust. Only tungsten and chromium according to their strong litophile character occur in lower concentrations than in Earth’s crust. Few of the M type asteroids, those that are the source of iron meteorites, are probably the most differentiated bodies in the asteroid belt. Their chemical composition considerably differs from the composition of CI carbonaceous chondrites. Among their the most differentiated (enriched in some elements and depleted in others) and differing from CI chondrites are the parent bodies of iron meteorites belonging to IVB group. However even they are far less differentiated than Earth’s crust. This is the proof of relatively long chemical evolution of IVB group parent body comparing to parent bodies of other groups of iron meteorites and CI chondrites, but from the other hand the evolution of this body is also significantly shorter than the chemical evolution of Earth’s crust.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2012, 3; 71-103
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Skład chondrytów węglistych jako wyznacznik zasobności planetoid typu C w surowce metaliczne
Composition of carbonaceous chondrites as an indicator of the abundance of C-type asteroids in metallic resources
Autorzy:
Blutstein, Konrad
Przylibski, Tadeusz A.
Łuszczek, Katarzyna
Gruchot, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/2034027.pdf
Data publikacji:
2022-03
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
carbonaceous chondrite
meteorite
C-type asteroid
asteroid belt
extraterrestrial mining
metal
extraterrestrial resources
Opis:
The chemical composition of carbonaceous chondrites was analysed in terms of the content of selected 24 metals, including noble metals and rare-earth metals. Based on the obtained results, the abundance of C-type asteroids in metallic raw materials was estimated and compared to the concentration of terrestrial deposits and the average content in the Earth’s crust. All the analysed elements, except rare earths, showed higher concentrations in carbonaceous chondrites than in the Earth’s crust, but most of them did not match the Earth’s deposit contents. The exception is Fe and Ni, the concentrations of which in carbonaceous chondrites significantly exceed the Earth’s deposit concentrations. The profitability of mining operations on C-type asteroids is also increased by the number of accompanying mineral commodities, mainly metals (Cr, Co, Cu, Au, Pt, Pd, Ag), and water ice. In addition, the parent bodies of carbonaceous chondrites occur relatively close to the moons of Jupiter and Saturn – potential space mission targets.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2022, 13; 7-26
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effects of temperature on the behaviour of the Antarctic sea star Odontaster validus
Autorzy:
Janecki, Tomasz
Kidawa, Anna
Potocka, Marta
Powiązania:
https://bibliotekanauki.pl/articles/2051603.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctica
asteroid
temperature
stress
behaviour
Źródło:
Polish Polar Research; 2010, 3; 273-284
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Perspektywy eksploatacji złóż metali z grupy platynowców z powierzchni asteroid
Prospects for the exploitation of platinum group metals (PGM) from the asteroid surface
Autorzy:
Kłósko, P.
Barański, K.
Powiązania:
https://bibliotekanauki.pl/articles/164263.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Górnictwa
Tematy:
górnictwo kosmosu
pas asteroid
złoża platynowców
space mining
asteroid belt
platinum group metals (PGM) deposits
Opis:
Nieustannie rosnące zapotrzebowanie na surowce metaliczne, w tym metale z grupy platynowców, skłania do poszukiwania nowych, dotychczas niewykorzystywanych źródeł surowców. Potencjalne źródło platynowców stanowią asteroidy znajdujące się w Pasie Planetoid oraz asteroidy z grupy obiektów bliskich ziemi (NEO - ang. Near-Earth Objects). Na podstawie prowadzonych obecnie badań i projektów w dziedzinie eksploracji kosmosu, agencje rządowe i przedsiębiorstwa prywatne opracowują technologie umożliwiające eksploatację złóż platynowców pochodzących z powierzchni asteroid. Biorąc pod uwagę wysokie ceny metali z grupy platynowców oraz ich ograniczone zasoby na Ziemi, pomysł eksploatacji złóż pochodzenia kosmicznego wydaje się uzasadniony ekonomicznie. Istotną kwestią są także aspekty prawne i etyczne, związane z wykorzystywaniem obiektów pozaziemskich w celach gospodarczych.
Constantly growing demand for metallic minerals, including platinum group metals (PGM) stimulates the search for new sources of raw materials, not used yet. The potential sources of PGM are asteroids located in the Asteroid Belt and asteroids from the group of Near-Earth Objects (NEO). On the basis of ongoing researches and projects in the field of space exploration, government agencies and private companies are working on technologies which enable exploitation of PGM from the surface of asteroids. Because of high prices of PGM minerals and their limited resources on Earth, the idea of exploitation of extraterrestrial sources appears to be economically reasonable. Also, the important issue is legal and ethical aspects connected with the use of extraterrestrial objects for economic purposes.
Źródło:
Przegląd Górniczy; 2017, 73, 10; 1-8
0033-216X
Pojawia się w:
Przegląd Górniczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of the Baszkówka and Mt. Tazerzait chondrites: genetic conclusions based on astrophysical data and the mineralogical and petrological data
Autorzy:
Pilski, A. S.
Przylibski, T. A.
Zagożdżon, P. P.
Powiązania:
https://bibliotekanauki.pl/articles/2059300.pdf
Data publikacji:
2001
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
meteorites
chondrites
solar system
asteroids
asteroid-collisions
Opis:
The L5 chondrites Baszkówka and Mt. Tazerzait are characterised. Their astronomical, mineralogical and petrological characteristics confirm that these meteorites are similar. They could be derived from the same parent body, though from the different depths below its surface. A third meteorite - the Tjerebon - might have arisen from the same swarm of meteoroids. The parent body to these meteorites in the asteroid belt can not be established at present. The porosity, of these chondrites suggests that they formed close to the surface of their parent asteroid. The process of formation of the parent rock of the Baszkówka chondrite is similar in some respects to sedimentation of a weakly compacted terrestrial sandstone. Thus, a two-stage geological history may be envisaged: firstly formation of the component minerals and mineral aggregates of this meteorite. Then, later in a different environment, the accretion of fragments of this parent material, together with a small amount of matrix, into a strongly porous sedimentary rock.
Źródło:
Geological Quarterly; 2001, 45, 3; 331-342
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zasobność w wybrane surowce metaliczne stref odmieszania planetarnych stopów krzemianowych i metalicznych na podstawie analizy składu chemicznego pallasytów i mezosyderytów
Wealth in selected metallic resources of planetary siliceous and metallic alloys liquation zones on the base of analyze of chemical composition of pallasites and mesosiderites
Autorzy:
Łuszczek, Katarzyna
Merkel, Jeremiasz
Powiązania:
https://bibliotekanauki.pl/articles/1033108.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
A-type asteroid
Xk-type asteroid
metallic resources
planetary siliceous and metallic alloys liquation zones
stony-iron meteorites
Opis:
Pallasites and mesosiderites belong to stony-iron meteorites and are representative matter of planetary siliceous and metallic alloys liquation zones. Pallasites origin most probably from frontier zones of parent asteroid between iron-nickel alloy core and mantle constituted of olivine, which was destructed during collisions and impacts. Unlike mesosiderites, pallasites parent body was disrupted probably after solidification of its differentiated interior. Asteroids: 201 Penelope, 250 Bettina and 337 Devosa are considered to be parent bodies of mesosiderites, while asteroids: 246 Asporina, 289 Nenetta and 446 Aeternitas are parent bodies of pallasites. Analysis of chemical composition of mesosiderites and pallasites and their comparison with chemical composition of the Earth’s crust allowed the authors to conclude on wealth of metallic resources on their parent bodies. Both pallasites and mesosiderites and in consequence the liquation zones of siliceous and metallic alloys from which these meteorites origin, have the highest abundances of PGM (Platinum Group of Metals) and Fe, Ni, Co, Cr, Au. Mesosiderites contain from several hundred thousand times to several hundred times more precious metals than the terrestrial crust. The highest enrichment can be observed for: Ru, Os, Pt, Re and Au. Moreover, Ni, Co, Ge and Cr have much higher concentrations in mesosiderites than in the Earth’s crust. Pallasites have the highest enrichment in precious metals as well (Ru, Ir, Os, Pt, Pd and Au). The higher concentration of Re, Ni, Co, Ge and Cr in pallasites than in the terrestrial crust was also observed. The higher abundances of Fe, Ni, Co, Au and Ir in bulk composition of mesosiderites and pallasites than in composition of CI chondrites, HED meteorites and the terrestrial crust give the evidence that crustal material composed of silicates during liquation processes lost most of these elements in favor to metallic alloys. The process of migration of elements and their liquating to metallic alloys was not done completely in the zone, where mesosiderites and pallasites origin, what indicate higher abundances of Fe, Ni and Co in silicates of stony-iron meteorites than in CI chondrites, HED meteorites and terrestrial crust.
Pallasyty i mezosyderyty, należące do meteorytów żelazno-kamiennych, stanowią materię, która reprezentuje planetarne strefy odmieszania stopów krzemianowych i metalicznych. Pallasyty pochodzą najprawdopodobniej ze strefy granicznej między żelazowo-niklowym jądrem, a oliwinowym płaszczem planetoidy macierzystej, rozbitej w wyniku zderzeń i kolizji. W przeciwieństwie do mezosyderytów, planetoida macierzysta pallasytów została rozbita prawdopodobnie już po zastygnięciu jej zdyferencjonowanego wnętrza. Za ciała macierzyste mezosyderytów uważa się planetoidy: 201 Penelope, 250 Bettina i 337 Devosa, zaś pallasytów planetoidy: 246 Asporina, 289 Nenetta czy 446 Aeternitas. Analiza składu chemicznego mezosyderytów i pallasytów oraz jej porównanie ze składem skorupy ziemskiej pozwoliła autorom wyciągnąć wnioski dotyczące zasobności w surowce metaliczne ich ciał macierzystych. Zarówno pallasyty jak i mezosyderyty, a co za tym idzie strefy odmieszania stopów krzemianowych i metalicznych z których pochodzą te meteoryty, są najbardziej zasobne w platynowce oraz Fe, Ni, Co, Cr i Au. Mezosyderyty zawierają od kilkuset tysięcy razy do kilkuset razy więcej metali szlachetnych niż skorupa ziemska. Największe wzbogacenie zaobserwować można dla: Ru, Os, Pt, Re i Au. Także Ni, Co, Ge i Cr występują w mezosyderytach w koncentracjach znacznie większych niż w skorupie ziemskiej. Również pallasyty wykazują największe wzbogacenie w metale szlachetne – Ru, Ir, Os, Pt, Pd i Au. W dalszej kolejności wśród metali występujących w pallasytach w koncentracjach większych niż w skorupie ziemskiej wymienić należy: Re, Ni, Co, Ge i Cr. Większa zawartość Fe, Ni, Co, Au i Ir w uśrednionym składzie mezosyderytów i pallasytów niż w składzie chondrytów CI, meteorytów z klanu HED czy skorupie ziemskiej świadczy o tym, że przypowierzchniowe strefy ciał zdyferencjonowanych zbudowane z krzemianów podczas procesów odmieszania utraciły znaczną część tych pierwiastków na rzecz stopów metalicznych. Proces migracji pierwiastków i ich odmieszania do stopu metalicznego nie zaszedł prawdopodobnie do końca w strefach, z których pochodzą mezosyderyty i pallasyty na co wskazuje większa zawartość Fe, Ni i Co w krzemianach meteorytów żelazno-kamiennych niż w chondrytach CI, meteorytach klanu HED i skorupie ziemskiej. Także większa zawartość litofilnego Cr w stopie FeNi mezosyderytów i pallasytów niż w meteorytach żelaznych stanowi dowód na to, że nie uległ on całkowitemu odmieszaniu do stopu krzemianowego zgodnie ze swoim geochemicznym charakterem.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2018, 9; 92-111
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Skład chondrytów zwyczajnych a potencjalne surowce pasa planetoid
Composition of Ordinary Chondrites and Potential Natural Resources of Asteroid Belt
Autorzy:
Łuszczek, Katarzyna
Przylibski, Tadeusz A.
Powiązania:
https://bibliotekanauki.pl/articles/1032729.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Fe-Ni alloy
asteroid
asteroid belt
chondrite
extraterrestrial resource
meteorite
meteorites
natural resource
ordinary chondrite
troilite
Opis:
In this article the authors present a simple method of determining the content of selected metal raw materials (Fe, Ni, Co) on the parent bodies of ordinary chondrites. Thanks to the use of planimeter for measuring, under microscope, polished slices of meteorites, it is possible to estimate quite accurately the proportion of these metals in the parent bodies of meteorites, i.e. on asteroids. When it comes to analysing a large number of polished slices, these results will be most likely comparable to much more expensive results of chemical tests conducted on meteorites. Based on the analysis of 16 thin polished sections and polished slices of 11 ordinary chondrites, the authors found out that the highest content of Fe, Ni and Co ore minerals, reaching 10,06% of the total volume, can be found in ordinary chondrites from group H. For ordinary chondrites from groups L and LL, it makes 3,86% and 3,93% of the volume respectively. Employing the results of chemical analyses available in literature sources, the authors also estimated the size of Fe, Ni and Co resources for several selected asteroids. These bodies contain higher concentrations of iron, nickel and cobalt than terrestrial deposits (those found in the earth’s crust). The total content of Fe on parent bodies of even the most deficient in metals group LL of ordinary chondrites is about twice as high as that in the earth’s crust. Cobalt occurs on parent asteroids of ordinary chondrites in concentrations 15–24 times as high as those in the earth’s crust, and the concentrations of Ni are 100–180 times as high as those in the earth’s crust. The contents of these metals on parent asteroids of ordinary chondrites are also several times as high as those in currently extracted deposits in the earth’s crust. Taking into account the mean annual terrestrial production of these metals, the authors have estimated that a parent asteroid of ordinary chondrites with the size between 433 Eros and 6 Hebe could satisfy our need for Fe, Ni and Co for the nearest several million to dozens of billion years. Considering the fact that asteroid belt contains plenty of such objects, and as many asteroids built chiefly of Fe-Ni alloy, one should regard this section of the Solar System as a practically inexhaustible source of metal raw materials. The prospect of their exploitation is probably much nearer than we can currently imagine.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2011, 2; 92-111
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chondryt węglisty NWA 4446
Carbonaceous chondrite NWA 4446
Autorzy:
Przylibski, Tadeusz A.
Blutstein, Konrad
Łuszczek, Katarzyna
Gruchot, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/2087069.pdf
Data publikacji:
2022
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
meteoryt
chondryt węglowy
chondryt CV3
Asteroida typu C
pas asteroid
Układ Słoneczny
ruda
meteorite
carbonaceous chondrite
CV3 chondrite
C-type asteroid
asteroid belt
Solar System
ore mineral
Opis:
The authors carried out petrographic, mineralogical, and chemical analyses (bulk chemical composition and microanalyses of mineral chemical composition) of NWA 4446 carbonaceous chondrite. NWA 4446 chondrite is classified as CV3, S2, W2. This meteorite is a rock fragment most likely from one of the C-type asteroids orbiting the Sun in the outer part of the asteroid belt. It represents the matter formed at the earliest stages of the formation of extrasola bodies in the solar system. As a result of the research, the authors documented a wider range of variation in the chemical composition of olivine crystals (Fa: 0.67-46.57 mol%) in the matrix and chondrules, and a much narrower range of variation in the chemical com- position of pyroxene crystals (Fs: 0.90–3.35 mol%) against the data used for the classification of the meteorite. The characteristics of the chondrules, ranging in size from 0.5 to more than 1 mm, allowed concluding that they constitute about 60% of the meteorite’s vol- ume, in which they form many structural and mineral varieties PO, POP, BO, PP and RP chondrules were observed. The remaining 40% of the chondrite volume is a matrix consisting of small crystals of pyroxenes, olivines, glass, as well as opaque minerals: sulphides, FeNi alloy, native copper and gold grains, carbonaceous substance, and compact CAIs. The mineral and chemical composi- tion of CAIs shows that their dominant mineral is melilite, accompanied by diopside and spinel. The chemical composition of spinel and diopside is very similar to their total chemical formulas, while the composition of melilite shows a significant sodium deficiency. Among the opaque minerals, one phase of the FeNi dominates - awaruite (Ni 3 Fe), and sulphides are represented by troilite (FeS) and mackinawite ((Fe,Ni) 9 S 8 ). Moreover, grains of native copper with an admixture of gold and grains of native gold with an admixture of platinum, nickel and copper with a size of several μm were identified. Taking into account the admixtures contained in the above-mentioned opaque minerals (mainly Co and Cu), the parent rock of the carbonaceous chondrite NWA 4446 can be considered to have been mineralized with Fe, Ni, Co and Cu ore minerals with the content of Au and Pt. This means that, we can expect deposits of native forms of the above-mentioned metals and sulphides on the parent bodies of carbonaceous chondrites of the CV group - C-type asteroids.
Źródło:
Przegląd Geologiczny; 2022, 70, 7; 513--526
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential importance of metallic resources of ordinary chondrite parent bodies
Autorzy:
Łuszczek, K.
Powiązania:
https://bibliotekanauki.pl/articles/89183.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
extraterrestrial resources
metallic resources
asteroid mining
ordinary chondrite parent bodies
Opis:
Demand for metallic resources constantly increases along with technological development. One of the factors that currently raises requests for resources is extensive space exploration. Especially, the exploration that involves space colonization creates the needs for resources not only on the Earth but also on other bodies in the Solar System. For instance, resources will be required for building bases and settlements or spare parts to machines, devices and space shuttles. The high transportation costs make launching them from our planet ineffective. New and attractive places for prospecting the resources in our Solar System are bodies located in the asteroid belt, namely parent bodies of ordinary chondrites. The goal of this paper is a review of scientific and economic aspects of extraterrestrial resources associated with such bodies. Studies of meteorites combined with scientific achievements of current space mission significantly improved our understanding of the origin, structure as well as chemical and mineral composition of these bodies and processes that affected them. This knowledge is used in XXI century to set up companies aiming at asteroid mining, or production of fuel and spare pieces in space. Additionally, owing to the fact that some asteroids are on collisional course with our planet, possibilities arise for resource utilization by deflection of hazardous asteroids and setting them on circumterrestrial or circummoon orbits.
Źródło:
Mining Science; 2018, 25; 57-69
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Asteroid-Effect in Society: The Formation of a Mannheim-type Historical Generation Post-COVID-19
Autorzy:
Szabó, Andrea
Déri, András
Powiązania:
https://bibliotekanauki.pl/articles/22792638.pdf
Data publikacji:
2022-09-15
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
Karl Mannheim
the new historical COVID-generation
asteroid effect
youth
social change
Opis:
Our conceptual paper argues that the COVID-19 pandemic has created conditions for the constitution of a new historical generation in Mannheimian terms. Current attempts in the sociology of youth to reconcile structure and agency with the concept of generation provide good starting points for interpreting a historical event such as the COVID-19 pandemic. While generations are not to be understood as homogeneous groups, constituting events can be compared to an asteroid that changes the trajectory of each social group. Thus, the concept of asteroid-effect helps us to overcome oversimplifying generational interpretations and to examine the effects of generation-forming events with an eye on structural inequalities. Our study provides an overview of the classical generational theory of Mannheim in light of some contemporary approaches. Based upon existing information, we illustrate how the generation-forming events can be interpreted and how structural inequalities can be considered.
Źródło:
Polish Sociological Review; 2022, 219, 3; 315-330
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aspects of life mode among Ordovician asteroids: Implications of new specimens from Baltica
Autorzy:
Blake, D B
Rozhnov, S.
Powiązania:
https://bibliotekanauki.pl/articles/22238.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
asteroid
Echinodermata
Ordovician
Asteroidea
new species
new genus
Estoniaster maennili
paleontology
functional morphology
Estonia
Opis:
A new genus and species of Asteroidea (Echinodermata), Estoniaster maennili, is described from the Upper Ordovician (Caradocian) of Estonia; it is similar to the western European genus Platanaster and the North American Lanthanaster and an as yet unpublished new genus. Specimens of Urasterella? sp. and Cnemidactissp. are recognized from the Middle Ordovician of northwest Russia; although similar to known species, incomplete preservation precludes more precise taxonomic assessment. Asteroids are important in many existing marine communities, and in spite of a meager fossil record, diversity suggests they were important in the early Paleozoic as well. Some debate has centered on arm flexibility in early asteroids, which bears on their roles in their communities. Parallels in ambulacral series arrangement between Ordovician and extant species and presence of an ambulacral furrow indicate similar broad ranges of motion and therefore potentially parallel ecologic roles. Many factors might have contributed to the differences between ancient and extant ambulacral articulation, including changes in positioning of a part of the water vascular system, changes in predation and bioturbation pressures, and taphonomic events that obscure skeletal details.
Źródło:
Acta Palaeontologica Polonica; 2007, 52, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Asteroid Belt as the Consequence of Resonance Density Convergence From Solar Velocity Around the Galaxy and Universal Dynamic Pressure
Autorzy:
Persinger, M. A.
Vares, D. A. E.
Powiązania:
https://bibliotekanauki.pl/articles/412061.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
origin of asteroid belt
universal dynamic pressure
intrinsic frequencies
matter formation
solar system
Opis:
The velocity of the solar system around the galaxy as it moves through universal dynamic pressure of about 0.15 nPa results in a critical mass density of 1.5 protons per cc. Interplanetary measurements indicate this density occurs within the space occupied by asteroids. Quantitative evidence is offered that the matter in asteroid space failed to accrete into a planet because of the disruptive resonance between universal dynamic pressure and the velocity of the system. The model may accommodate the chemical characteristics of the different regions of the asteroid belt and the marked difference in planetary characteristics above (the inner planets) and below (the “gas giants”) the critical density. The energy accumulated within the functional toroidal space between Mars and Jupiter since the formation of the solar system is equivalent to the total mass of asteroids. If energy is still emerging within this region then the probability of non-traditional disruption of orbits for certain masses of asteroids may have significant impact. Specific frequencies that should show enhanced power based upon these calculations are derived.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 15; 73-79
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Astroecology, cosmo-ecology, and the future of life
Autorzy:
Mautner, M.N.
Powiązania:
https://bibliotekanauki.pl/articles/56600.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
astroecology
asteroid
astrobiology
life future
nutrient
biotic ethics
in situ resource
human life
cosmoecology
future
Opis:
Astroecology concerns the relations between life and space resources, and cosmo-ecology extrapolates these relations to cosmological scales. Experimental astroecology can quantify the amounts of life that can be derived from space resources. For this purpose, soluble carbon and electrolyte nutrients were measured in asteroid/meteorite materials. Microorganisms and plant cultures were observed to grow on these materials, whose fertilities are similar to productive agricultural soils. Based on measured nutrient contents, the 1022 kg carbonaceous asteroids can yield 1018 kg biomass with N and P as limiting nutrients (compared with the estimated 1015 kg biomass on Earth). These data quantify the amounts of life that can be derived from asteroids in terms of time-integrated biomass [BIOTAint = biomass (kg) × lifetime (years)], as 1027 kg-years during the next billion years of the Solar System (a thousand times the 1024 kg-years to date). The 1026 kg cometary materials can yield biota 10 000 times still larger. In the galaxy, potential future life can be estimated based on stellar luminosities. For example, the Sun will develop into a white dwarf star whose 1015 W luminosity can sustain a BIOTAint of 1034 kg-years over 1020 years. The 1012 main sequence and white and red dwarf stars can sustain 1046 kg-years of BIOTAint in the galaxy and 1057 kg-years in the universe. Life has great potentials in space, but the probability of present extraterrestrial life may be incomputable because of biological and ecological complexities. However, we can establish and expand life in space with present technology, by seeding new young solar systems. Microbial representatives of our life-form can be launched by solar sails to new planetary systems, including extremophiles suited to diverse new environments, autotrophs and heterotrophs to continually form and recycle biomolecules, and simple multicellulars to jump-start higher evolution. These programs can be motivated by life-centered biotic ethics that seek to secure and propagate life. In space, life can develop immense populations and diverse new branches. Some may develop into intelligent species that can expand life further in the galaxy, giving our human endeavors a cosmic purpose.
Źródło:
Acta Societatis Botanicorum Poloniae; 2014, 83, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kartografia planetarna – historia, dane źródłowe, metodyka
Planetary cartography – history, source data, methodology
Autorzy:
Pędzich, P.
Latuszek, K.
Powiązania:
https://bibliotekanauki.pl/articles/204325.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Geograficzne
Tematy:
mapa
planeta
księżyc
asteroida
historia
kartografia planetarna
misja kosmiczna
map
planet
moon
asteroid
history
planetary cartography
space mission
Opis:
Artykuł ma charakter przeglądowy i jest pierwszym z cyklu dwóch artykułów przybliżających problematykę z zakresu kartografii planetarnej. Przedstawiono w nim m.in. zarys historii map ciał niebieskich, poczynając od pierwszych map Księżyca opracowanych na podstawie obserwacji teleskopowych, po współczesne mapy wykonywane z wykorzystaniem sond kosmicznych, scharakteryzowano podstawowe źródła danych oraz przedstawiono rozwój metod ich pozyskiwania, opisano najważniejsze misje kosmiczne, od pionierskich wypraw radzieckich po współczesne badania Marsa i asteroid; przedstawiono również wybrane aspekty metodyki opracowania map obiektów pozaziemskich.
The article is the first in the series of two articles outlining the problems of planetary cartography. The article is a review, it presents, among others, the outline of history of celestial bodies mapping, to begin with the first map of the Moon developed on the basis of telescoping observation, to contemporary maps based on measurements made by the space probes. It characterizes the basic data sources and presents the development of data obtaining methods, the article describes the most important space missions from the pioneer Soviet expeditions to current research of Mars and asteroids, it also presents some aspects of extraterrestrial objects mapping methodology.
Źródło:
Polski Przegląd Kartograficzny; 2014, T. 46, nr 3, 3; 253-282
0324-8321
Pojawia się w:
Polski Przegląd Kartograficzny
Dostawca treści:
Biblioteka Nauki
Artykuł
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