ASTRONOMIJA
- sinuhe
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#976 Re: ASTRONOMIJA
Mozda vazi za druge univerzume i drugacije oblike zivota.
- Connaisseur Karlin
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- BHCluster
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- Connaisseur Karlin
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#980 Re: ASTRONOMIJA
tekst je uzasanBHCluster wrote:NASA pronašla dokaz o životu na patuljastoj planeti Ceres
ovo je primjer kvalitentog teksta
izvor: NASAThe discovery adds to the growing list of bodies in the solar system where organics have been found. Organic compounds have been found in certain meteorites as well as inferred from telescopic observations of several asteroids. Ceres shares many commonalities with meteorites rich in water and organics -- in particular, a meteorite group called carbonaceous chondrites. This discovery further strengthens the connection between Ceres, these meteorites and their parent bodies.
"This is the first clear detection of organic molecules from orbit on a main belt body," said Maria Cristina De Sanctis, lead author of the study, based at the National Institute of Astrophysics, Rome. The discovery is reported in the journal Science.
Data presented in the Science paper support the idea that the organic materials are native to Ceres. The carbonates and clays previously identified on Ceres provide evidence for chemical activity in the presence of water and heat. This raises the possibility that the organics were similarly processed in a warm water-rich environment.
Significance of organics
The organics discovery adds to Ceres' attributes associated with ingredients and conditions for life in the distant past. Previous studies have found hydrated minerals, carbonates, water ice, and ammoniated clays that must have been altered by water. Salts and sodium carbonate, such as those found in the bright areas of Occator Crater, are also thought to have been carried to the surface by liquid.
“This discovery adds to our understanding of the possible origins of water and organics on Earth,” said Julie Castillo-Rogez, Dawn project scientist based at NASA's Jet Propulsion Laboratory in Pasadena, California.
Where are the organics?
The VIR instrument was able to detect and map the locations of this material because of its special signature in near-infrared light.
The organic materials on Ceres are mainly located in an area covering approximately 400 square miles (about 1,000 square kilometers). The signature of organics is very clear on the floor of Ernutet Crater, on its southern rim and in an area just outside the crater to the southwest. Another large area with well-defined signatures is found across the northwest part of the crater rim and ejecta. There are other smaller organic-rich areas several miles (kilometers) west and east of the crater. Organics also were found in a very small area in Inamahari Crater, about 250 miles (400 kilometers) away from Ernutet.
In enhanced visible color images from Dawn's framing camera, the organic material is associated with areas that appear redder with respect to the rest of Ceres. The distinct nature of these regions stands out even in low-resolution image data from the visible and infrared mapping spectrometer.
"We're still working on understanding the geological context for these materials," said study co-author Carle Pieters, professor of geological sciences at Brown University, Providence, Rhode Island.
- pirmin
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#981 Re: ASTRONOMIJA
Koliko realnosti ima u "Gravity" filmu?
- Connaisseur Karlin
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- Arminovski
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#983 Re: ASTRONOMIJA
Vidi od Neil de Grasse Tysona komentare.pirmin wrote:Koliko realnosti ima u "Gravity" filmu?
- SmokingMan
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#984 Re: ASTRONOMIJA
Arminovski wrote:Vidi od Neil de Grasse Tysona komentare.pirmin wrote:Koliko realnosti ima u "Gravity" filmu?
"...Why is that Sandra Bullock,a medical doctor,reparing the Hubble telescope...Excuse me,we don't send medical doctors to repair Hubble space telescope anymore..."
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#985 Re: ASTRONOMIJA
Neil je zvijer,zna dobro objasniti to o cemu prica,milina ga slusati.imate njegove emisije na nat.geo navece.ima jednu manu koja kvari cjelokupan dojam ali ne bih je spominjao jer bi tema otisla u drugom pravcu.pisite jos,nisam neki znalac ali volim cuti nesta pametno
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#986 Re: ASTRONOMIJA
koja je manaCavali wrote:Neil je zvijer,zna dobro objasniti to o cemu prica,milina ga slusati.imate njegove emisije na nat.geo navece.ima jednu manu koja kvari cjelokupan dojam ali ne bih je spominjao jer bi tema otisla u drugom pravcu.pisite jos,nisam neki znalac ali volim cuti nesta pametno
- Dope_Man
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#987 Re: ASTRONOMIJA
Vjerovatno misli na to sto zna nekad i previse napadno ici protiv nelogicnosti religija. I sam ga volim slusati, i ateista sam, ali bih se donekle i sa tim slozio. Zna nekad, gdje je tema iskljucivo nauka, preci malo preozbiljno na pricu o nelogicnosti religija iako bi bilo bolje da samo nastavi o nauci.saimidin wrote: koja je mana
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#988 Re: ASTRONOMIJA
ja nemam problem sa tim religije i jesu pune nelogicnosti.Dope_Man wrote:Vjerovatno misli na to sto zna nekad i previse napadno ici protiv nelogicnosti religija. I sam ga volim slusati, i ateista sam, ali bih se donekle i sa tim slozio. Zna nekad, gdje je tema iskljucivo nauka, preci malo preozbiljno na pricu o nelogicnosti religija iako bi bilo bolje da samo nastavi o nauci.saimidin wrote: koja je mana
meni malo smeta kad pocne da mase rukama i ubacuje neke citate koji zvuce kao stihovi neke pjesme,
mada je to stvar ukusa, al mene to nervira, npr biblija ne kaze kako se nebesa krecu, nego kako doci na nebese(u raj).
reci jasno nema dokaza za raj i zdravo
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#989 Re: ASTRONOMIJA
poznati vloger o kretanju Zemlje i još koječemu što ide uz to
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#991 Re: ASTRONOMIJA
http://www.space.com/36260-april-fools- ... ng-by.html
večeras najbolja vidljivost Komete 41P/Tuttle-Giacobini-Kresák
zna li neko može li se vidjeti golim okom???
večeras najbolja vidljivost Komete 41P/Tuttle-Giacobini-Kresák
zna li neko može li se vidjeti golim okom???
- Arminovski
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#992 Re: ASTRONOMIJA
Jedna od boljih epizoda. Onu o Banach Tarski paradoksu sam gledao minimalno 10 puta i jos uvijek je ne razumijem.seldzuk wrote:
poznati vloger o kretanju Zemlje i još koječemu što ide uz to
- Connaisseur Karlin
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#993 Re: ASTRONOMIJA
Armanovski,koji dio ti nije jasan?Arminovski wrote:Jedna od boljih epizoda. Onu o Banach Tarski paradoksu sam gledao minimalno 10 puta i jos uvijek je ne razumijem.seldzuk wrote:
poznati vloger o kretanju Zemlje i još koječemu što ide uz to
nema finalnog odgovoraBanach-Tarski seems far more believable.
Physically, the Banach-Tarski Paradox cannot be achieved, because a solid sphere
is comprised of a finite number of atoms. But in an Euclidean space of dimension 3
or higher, a sphere is infinitely dense and splitting it creates pieces which are also
infinitely dense. Therefore, in actuality, it is not that surprising these pieces can
be rotated and transformed to make two spheres of equal volume as the original.
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#994 Re: ASTRONOMIJA
da zahvalim i seldzuku i tebi. njemu na prvom videu, a tebi na preporuci. podsjetio sam se zaista dosta stvari. a sto se paradoksa tice Tarski se radi na prvoj ili drugoj godini PMF-a (zaboravio sam jer je od toga sada preko 16 godina proslo...), dok za kombinaciju sa Banachom do sada nisam vidio i ovo zaista super izgleda i zvuci, a i vloger ima lijep pristup.Arminovski wrote:Jedna od boljih epizoda. Onu o Banach Tarski paradoksu sam gledao minimalno 10 puta i jos uvijek je ne razumijem.seldzuk wrote:
poznati vloger o kretanju Zemlje i još koječemu što ide uz to
rad sa beskonacnostima u matematici danas izgleda jako popularan. jedni bi da je ukidaju, drugi da je prosiruju. ne znam, meni je pravo drago vidjeti kada se zaguzica u nauci, jer iz toga uvijek nesto naucis. evo ja sam sada naucio da su povezali Banacha sa Tarskim. jedino ne valja sto ovom pricom tema ode od astronomije, pa se unaprijed izvinjavam.
- Arminovski
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#995 Re: ASTRONOMIJA
Ne shvatam zasto samo dvije sfere napravi. Zar na ovakav nacin ne bi mogao da napravi beskonacan broj sfera? Izgubim se oko 18 minute, zaspim najcesce izmedju 10. i 12. ) Kontam princip, on to malo zbrza na kraju.Connaisseur Karlin wrote:Armanovski,koji dio ti nije jasan?Arminovski wrote:Jedna od boljih epizoda. Onu o Banach Tarski paradoksu sam gledao minimalno 10 puta i jos uvijek je ne razumijem.seldzuk wrote:
poznati vloger o kretanju Zemlje i još koječemu što ide uz to
nema finalnog odgovoraBanach-Tarski seems far more believable.
Physically, the Banach-Tarski Paradox cannot be achieved, because a solid sphere
is comprised of a finite number of atoms. But in an Euclidean space of dimension 3
or higher, a sphere is infinitely dense and splitting it creates pieces which are also
infinitely dense. Therefore, in actuality, it is not that surprising these pieces can
be rotated and transformed to make two spheres of equal volume as the original.
- Connaisseur Karlin
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#996 Re: ASTRONOMIJA
Arminovski, iskreno receno, izgube se i oni,a zato me ne cudi i da se mi izgubimo jednostavno ne postoji tocan ili finalan odgovor,a taman kad skontas da si pronasao odgovor,desi se novo pitanje Mislim da i jeste u ovakvim radovima uvijek kljucna rijec na dimenzijama.Arminovski wrote:Ne shvatam zasto samo dvije sfere napravi. Zar na ovakav nacin ne bi mogao da napravi beskonacan broj sfera? Izgubim se oko 18 minute, zaspim najcesce izmedju 10. i 12. ) Kontam princip, on to malo zbrza na kraju.Connaisseur Karlin wrote: Armanovski,koji dio ti nije jasan?
nema finalnog odgovoraBanach-Tarski seems far more believable.
Physically, the Banach-Tarski Paradox cannot be achieved, because a solid sphere
is comprised of a finite number of atoms. But in an Euclidean space of dimension 3
or higher, a sphere is infinitely dense and splitting it creates pieces which are also
infinitely dense. Therefore, in actuality, it is not that surprising these pieces can
be rotated and transformed to make two spheres of equal volume as the original.
- triconja
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#997 Re: ASTRONOMIJA
Zasto gledati proslost univerzuma?
-
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#998 Re: ASTRONOMIJA
zato sto onda isti princip vrijedi nadalje. jer u matematici dokazujes n+1 slucaj. ako napravis taj i takav dokaz, onda vazi za sve ostale n+1. najtezi korak u kojem se ljudi izgube je onaj kada u onom "rjecniku" oduzme prvo slovo ili kada u zadnjem slucaju pomjera "pomjeranja".Arminovski wrote: Ne shvatam zasto samo dvije sfere napravi. Zar na ovakav nacin ne bi mogao da napravi beskonacan broj sfera? Izgubim se oko 18 minute, zaspim najcesce izmedju 10. i 12. ) Kontam princip, on to malo zbrza na kraju.
da, ovim metodom mozes napraviti beskonacan broj sfera od jedne. i, da, to bi upravo znacilo da se moze napraviti bilo koja kolicina bilo cega koja nam je potrebna za bilo sta. zato teza i jeste kontraverzna. naravno da je glavno pitanje - gdje je tu greska (i da li je ima)? ja bih licno tipovao na polove i centar, jer njih samo izracunavas, ali si ih fakticki izdvojio u jednoj od sfera. bas kao prvi primjer sa cokoladom. tesko je reci vise, jer sam tek sada vidio ovaj primjer. ali da je zanimljivo - definitivno!
- Arminovski
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#999 Re: ASTRONOMIJA
Hvala Belfy za n+1. Nije mi to palo napamet. Da li bi rotirajuci sferu u pocetku za x stepeni dobio iste tacke kao i u primjeru (kada biljezi tacke na sferi)? Rotacija ne dodaje ili oduzima nista je li tako?