Spitzer u sam centar

[Sich]

Ma, poslednjih godina, Hoking je postao marketinska zvezda. Tu tezu dokazuje njegova naucna produktivnost koja nekako
se sve manje vidi.

Oftopik, al morao sam

[Djorvoz]

Oftopisc: Nažalost sve njegove knjige liče previše jedna na drugu

[sashastar]

OFF topic
Jel nekom treba WEB KNJIGA:
-Stiven Hoking - Crne rupe i bebe-Vaseljene
-Stiven Hoking - Kratka Povest Vremena

[Skyw@lker]

Ja ih imam u klasicnom formatu, ali moze, sto da ne!  :wink:
Slazem se da je Hoking postao malo "komercijalizovan" (kada sam ga video pored Lukasa u "Alien Planet"-u, sve mi je bilo jasno, a tek u Simpsonovima ili Futurami), ali ipak nemojmo osporavati jednu stvar - da je "faca" svetskog glasa - ja gotivim njegove knjige i kraj. Ukusi su razliciti.

[GENESIS]

Lepo kaze narodna poslovica "Gde ima dima ima i vatre" , a Spitzer Space Telescope nam to i dokazuje  :roll:

[Gugi]

KAKO JE MOGUCE DA SE OVE DVIJE SLIKE TOLIKO RAZLIKUJU???
Pa sto je to omogucilo da se na drugoj fotografiji vidi ta maglina (to je?) a na onoj prvoj uopce nije vidjena?
Moze netko objasniti? Vrlo je interesantno!

[GENESIS]

Bez obzira koliko je jaka optika teleskopa na zemlji , atmosfera je ogranicavajuci faktor. Zato se teleskopi kao sto je SPITZER postavljaju u svemir. Svemirski teleskopi daju najcistije slike jer nisu ograniceni losim uticajem atmosfere  :roll:

[Joca]

KAKO JE MOGUCE DA SE OVE DVIJE SLIKE TOLIKO RAZLIKUJU???
Pa sto je to omogucilo da se na drugoj fotografiji vidi ta maglina (to je?) a na onoj prvoj uopce nije vidjena?
Moze netko objasniti? Vrlo je interesantno!

Prva je snimljena u optickom, a druga u infracrvenom delu spektra - na razlicitim talasnim duzinama vidis razlicite objekte, komponente, itd itsl [mozes naci gomilu primera slika istog objekta na razlicitim talasnim duzinama - mnogo toga moze da se sazna iz poredjenja dve takve slike]

[GENESIS]

[Joca]

Eto npr..   IRAC konza zakon..  

[GENESIS]

Andromeda Galaxy (M31)
Spitzer / infrared

[gucic]

Uuf....
nemam komentar...



daj pun link za fotku u jacim rezolucijama ako ima...luddooo.

[GENESIS]

Evo link za Andromeda Galaxy (M31) pa birajte slike

http://www.spitzer.caltech.edu/Media/releases/ssc2005-20/ssc2005-20a.shtml

[GENESIS]

Messier 51, also known as the "Whirlpool Galaxy" or as NGC 5194, is located about 37 million light-years away in the constellation Canes Venatici. This Spitzer Space Telescope image is a four-color composite of invisible infrared light, showing emissions from wavelengths of 3.6 microns (blue), 4.5 microns (green), 5.8 microns (orange) and 8.0 microns (red).

[GENESIS]

Andromeda Makes a Splash

This infrared composite image from NASA's Spitzer Space Telescope shows the Andromeda galaxy, a neighbor to our Milky Way galaxy. The main image (top) highlights the contrast between the galaxy's choppy waves of dust (red) and smooth sea of older stars (blue). The panels below the main image show the galaxy's older stars (left) and dust (right) separately. Spiral galaxies tend to form new stars in their dusty, clumpy arms, while their cores are populated by older stars.

The Spitzer view also shows Andromeda's dust lanes twisting all the way into the center of the galaxy, a region that is crammed full of stars. In visible-light pictures, this central region tends to be dominated by starlight.

Astronomers used these new images to measure the total infrared brightness of Andromeda. Because the amount of infrared light given off by stars depends on their masses, the brightness measurements provided a novel method for "weighing" the Andromeda galaxy. According to this method, the mass of the stars in Andromeda is about110 billion times that of the sun, which is in agreement with past calculations. This means the galaxy contains about one trillion stars (because most stars are actually less massive than the sun). For comparison, the Milky Way is estimated to hold about 400 billion stars.

A small, companion galaxy called NGC 205 is visible above Andromeda. Another companion galaxy called M32 can also been seen below the galaxy.

The Andromeda galaxy, also known affectionately by astronomers as Messier 31, is located 2.5 million light-years away in the constellation Andromeda. It is the closest major galaxy to the Milky Way, making it the ideal specimen for carefully examining the nature of galaxies. On a clear, dark night, the galaxy can be spotted with the naked eye as a fuzzy blob.

Andromeda's entire disk spans about 260,000 light-years, which means that a light beam would take 260,000 years to travel from one end of the galaxy to the other. By comparison, the Milky Way is about 100,000 light-years across. When viewed from Earth, Andromeda occupies a portion of the sky equivalent to seven full moons.

Because this galaxy is so large, the infrared images had to be stitched together out of about 3,000 separate Spitzer exposures. The light detected by Spitzer's infrared array camera at 3.6 and 4.5 microns is sensitive mostly to starlight and is shown in blue and green, respectively. The 8-micron light shows warm dust and is shown in red. The contribution from starlight has been subtracted from the 8-micron image to better highlight the dust structures.