Author Topic: Otkrivena planeta slična Zemlji  (Read 5160 times)

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Alexdelarge

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Otkrivena planeta slična Zemlji
« on: 07-11-2007, 21:30:13 »
Otkrivena planeta slična Zemlji

Američki naučnici otkrili su planetu koja se okreće oko zvezde slične Suncu, što navodi na pretpostavku da u svemiru postoji više planetarnih sistema sličnih ovom čiji je deo naša planeta.

Novootkrivena planeta je veća od Zemlje i okreće se oko zvezde 55 Kankri, u sazveždju Raka. Ranije su otkrivene četiri planete u sistemu te zvezde, medjutim peta je postala prava senzacija u svetu astronomije, izjavila je američka naučnica Debra Fišer, prenosi agencija Itar Tas.

Prema njenim rečima, otkriće planetarnog sistema s pet planeta ide u prilog pretpostavci da život postoji i van solarnog sistema.

"Zvezda 55 Kankri slična je Suncu, ima približno istu masu i stara je koliko i Sunce", izjavila je Fišerova, dodajući da je moguće da je ta zvezda okružena brojnim planetama.

Američki istraživači posvetili su otkrivanju planeta u sistemu 55 Kankri 18 godina. Orbita prve planete otkrivena je pre četiri godine.

Peta planeta okreće se na rastojanju od 115 miliona kilometara od zvezde Kankri. Temperatura te planete trebalo bi da bude nešto viša nego na Zemlji, smatra astronom Lunin s Univeziteta Arizone.

Puni krug oko zvezde to kosmičko telo napravi za 260 dana.

(Tanjug)
moj se postupak čitanja sastoji u visokoobdarenom prelistavanju.

srpski film je remek-delo koje treba da dobije sve prve nagrade.

Mixitron M. Storm

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Otkrivena planeta slična Zemlji
« Reply #1 on: 07-11-2007, 22:08:42 »
Ovo će zvučati odvratno, ali sve su bliže otkrivanju rupe na saksiji :)

Black swan

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Otkrivena planeta slična Zemlji
« Reply #2 on: 07-11-2007, 22:31:15 »
ma koga to interesuje... sem tinejđera

ćim dođe prvi račun... odmah se spuste na zemlju  :evil:
Jedini forum na kojem pravim tipkarske grekše

mac

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Otkrivena planeta slična Zemlji
« Reply #3 on: 07-11-2007, 22:45:59 »
Račun? Ne razumem.

Mixitron M. Storm

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Otkrivena planeta slična Zemlji
« Reply #4 on: 07-11-2007, 23:09:50 »
Kako to Lurd ~reče jednom prilikom,
"...od ljudi koji misle da Gospodar prstenova nije realan jer Hobiti ne plaćaju porez i sl."

Odn., čim krenu da pristižu računi (tzv. postajanje "svojim čovekom") odma' za'ebeš sve te puste fantazije.

Black swan

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Otkrivena planeta slična Zemlji
« Reply #5 on: 07-11-2007, 23:30:30 »
Quote from: "mac"
Račun? Ne razumem.


ja sam genije jer me niko ne razume  :(  :cry:

ja sam kao tinejđer pratio nasine vijesti
cekao da se pojave vanzemaljci (onda sam upoznao ghoula na netu i shvatio sam da to nije potrebno... imamo ih ovdje)
posmatrao nebo
skupljao postere neba iz nacionalne geografije
nebula i ti fazoni
kupovao od novina sve sto ima veze s space shutleom i teleskopima

i t d

sve dok nije dosao prvi racun kojeg sam ja trebao platiti  :x  

otada vise ne gledam u nebo  :x  nego u sanduče... kada stiže izvještaj iz banke + računi

 :idea:  sve je to urota ljudi u crnom jer sto manje ljudi gleda u nebo veća je vjerovatnoća da će manje ljudi primijetiti vanzemaljce... uh odoh okačiti filmove kao što su fire in the sky star man i likvid sky na listu za gledanje  :idea:
Jedini forum na kojem pravim tipkarske grekše

mac

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Otkrivena planeta slična Zemlji
« Reply #6 on: 08-11-2007, 12:11:13 »
Aaaa...  :idea:

Ali treba biti svestan toga da je okupiranost sopstvenom dobrobiti (a da ekstrapoliramo: i egzistencijom) takođe jedna vrsta zamajavanja. Kad je već tako trebalo bi deo svojih resursa trošiti i na zamajavanje od opšteg značaja, čisto za slučaj da zaista postoji sistem zagrobnog nagrađivanja i kažnjavanja. A i čovek se tad lepše oseća.

Onaj ko ima bilo šta bolje od klasičnog modema mogao bi da učestvuje u bilo kom @Home projektu http://en.wikipedia.org/wiki/List_of_distributed_computing_projects , tipa SETI@Home, i da tako i traži male zelene i plaća račune bez loših posledica po oba.

Mixitron M. Storm

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Otkrivena planeta slična Zemlji
« Reply #7 on: 08-11-2007, 16:29:16 »
Kad počnu da umanjuju porez onima koji mesečno imaju preko 24č procesorskog rada na tim kućnim projektima...

Melkor

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"Realism is a literary technique no longer adequate for the purpose of representing reality."

Meho Krljic

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Re: Otkrivena planeta slična Zemlji
« Reply #9 on: 27-02-2016, 07:40:51 »
Earth May Be a 1-in-700-Quintillion Kind of Place - D-brief
 
Quote

A new study suggests that there are around 700 quintillion planets in the universe, but only one like Earth. It’s a revelation that’s both beautiful and terrifying at the same time.
Astrophysicist Erik Zackrisson from Uppsala University in Sweden arrived at this staggering figure — a 7 followed by 20 zeros  — with the aid of a computer model that simulated the universe’s evolution following the Big Bang. Zackrisson’s model combined information about known exoplanets with our understanding of the early universe and the laws of physics to recreate the past 13.8 billion years.
Zackrisson found that Earth appears to have been dealt a fairly lucky hand. In a galaxy like the Milky Way, for example, most of the planets Zackrisson’s model generated looked very different than Earth — they were larger, older and very unlikely to support life. The study can be found on the preprint server arXiv, and has been submitted to The Astrophysical Journal.Rethinking CopernicusZackrisson’s work suggests an alternative to the commonly held assumption that planets similar to Earth must exist, based on the sheer number of planets out there. Ever since Copernicus put forth the theory that Earth is not the center of the universe, scientists have expanded the map of the cosmos and diminished our planet’s relative uniqueness. Current estimates hold that there are some 100 billion galaxies in the universe containing about 10^18 stars, or a billion trillion.
One of the most fundamental requirements for a planet to sustain life is to orbit in the “habitable zone” of a star — the “Goldilocks” region where the temperature is just right and liquid water can exist. Astronomers have, to this point, discovered around 30 exoplanets in the habitable zones of stars. Simply extrapolating that figure based on the known number of stars suggests that there should be about 50 billion such planets in the Milky Way alone. Probability seems to dictate that Earth-twins are out there somewhere.
But according to Zackrisson, most planets in the universe shouldn’t look like Earth. His model indicates that Earth’s existence presents a mild statistical anomaly in the multiplicity of planets. Most of the worlds predicted by his model exist in galaxies larger than the Milky Way and orbit stars with different compositions — an important factor in determining a planet’s characteristics. His research indicates that, from a purely statistical standpoint, Earth perhaps shouldn’t exist.More Data NeededStill, the model is based on what we currently understand about the universe, and if there’s one thing we have figured out so far, it’s that we still don’t know very much. The model creates exoplanets based only on the ones we have discovered, which is an extremely small sample size that probably doesn’t provide a representative cross-section of all of the planets in existence.
“It’s certainly the case that there are a lot of uncertainties in a calculation like this. Our knowledge of all of these pieces is imperfect,” co-author Andrew Benson told Scientific American.“It was only recently that we even had enough exoplanet data to make a model of this kind possible.”
Nevertheless, the researchers are confident in the broader implications of their model: Earth is more than your garden-variety planet.