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BHCluster wrote:NASA pronašla dokaz o životu na patuljastoj planeti Ceres

The 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 wrote:Koliko realnosti ima u "Gravity" filmu?

Arminovski wrote:

pirmin wrote:Koliko realnosti ima u "Gravity" filmu?

Vidi od Neil de Grasse Tysona komentare.

Cavali 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

saimidin wrote: koja je mana

Dope_Man wrote:

saimidin wrote: koja je mana

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.

seldzuk wrote:
poznati vloger o kretanju Zemlje i još koječemu što ide uz to

Arminovski wrote:

seldzuk wrote:
poznati vloger o kretanju Zemlje i još koječemu što ide uz to

Jedna od boljih epizoda. Onu o Banach Tarski paradoksu sam gledao minimalno 10 puta i jos uvijek je ne razumijem.

Banach-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.

Arminovski wrote:

seldzuk wrote:
poznati vloger o kretanju Zemlje i još koječemu što ide uz to

Jedna od boljih epizoda. Onu o Banach Tarski paradoksu sam gledao minimalno 10 puta i jos uvijek je ne razumijem.

Connaisseur Karlin wrote:

Arminovski wrote:

seldzuk wrote:
poznati vloger o kretanju Zemlje i još koječemu što ide uz to

Jedna od boljih epizoda. Onu o Banach Tarski paradoksu sam gledao minimalno 10 puta i jos uvijek je ne razumijem.

Armanovski,koji dio ti nije jasan?

Banach-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.

nema finalnog odgovora

Arminovski wrote:

Connaisseur Karlin wrote: Armanovski,koji dio ti nije jasan?

Banach-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.

nema finalnog odgovora

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.

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.