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| Ultimi arrivi - Messier Objects |
Messier_074-PIA13376.jpgM 74 - Spiral Galaxy, the Asteroid 3540 Protesilaos and an unsual resemblance...149 visiteCaption NASA:"It's a bird! It's a plane! Nope, it's an Asteroid tracking its way across the sky with a beautiful Spiral Galaxy in the background. In the center of this new mosaic image captured by NASA's Wide-field Infrared Survey Explorer (WISE) is the galaxy Messier 74, with its spiral arms seen face-on. The bright reddish object moving across the lower right part of the image is the much closer asteroid 3540 Protesilaos, seen at different points in its orbit around the Sun. WISE observed and detected this previously known Asteroid a total of ten times, although only a few of those frames were used in this mosaic.
Also known as NGC 628, the Messier 74 Galaxy is between 24,5 and 36 Million Light-Years away, and has a diameter of about 100.000 LY.
It is suspected to have a Black Hole at its center, with a mass equal to 10.000 Suns. It is one of only a handful of known Black Holes with masses intermediate between the relatively smaller ones that form from collapsing stars and the supermassive Black Holes millions of times more massive than the Sun, which are more typically found at the centers of Galaxies.
Although it is called a Messier Object, Messier 74 was actually discovered by Pierre Mechain in 1780, who then told his friend Charles Messier about it. As one of the dimmest of all Messier objects, this Galaxy is a challenge for amateur astronomers to see in Visible Light, but the WISE cameras captured it clearly in InfraRed Light.
The colors used in this image represent different wavelengths of IR Radiation. Blue and cyan represent light at 3,4 and 4,6 microns, respectively. These colors show both nearby stars inside the Milky Way Galaxy and the combined light of billions of stars that make up Messier 74. Green and red represent light from 12 and 22 microns, respectively. These colors show light from cooler objects and material. Dust in star-forming regions in Messier 74 traces its spiral structure. The coolest object in the picture is the asteroid 3540 Protesilaos.
This Asteroid was first seen in 1973 by the German astronomer Freimut Brngen, who discovered more than 500 Asteroids while he was researching galaxies. At the time that WISE observed 3540 Protesilaos, it was at a distance of about 772 MKM from Earth (approx. 480 million miles, or also approx. 43 Light-Minutes). It is classified as a Jupiter Trojan Minor Planet, which are small rocky bodies that share the same orbit around the Sun as the planet Jupiter. Based on the infrared observations, the WISE team estimates the Asteroid to be about 90 Km (approx. 56 miles) across and to reflect only a few percent of the light that lands on it, which makes it about as dark as coal.
By convention, Trojan Asteroids are named after the heroes from the Trojan War. In this case, asteroid 3540 is named after the hero Protesilaos. According to Greek Mythology, Protesilaos was the first Greek to set foot on Trojan land during the war.
Unfortunately for him, there was a prophecy that the first soldier in the war to step onto land from a battle ship would die. The prophecy quickly came true and Protesilaos was killed.
JPL manages the Wide-field Infrared Survey Explorer for NASA's Science Mission Directorate, Washington. The principal investigator, Edward Wright, is at UCLA. The mission was competitively selected under NASA's Explorers Program managed by the Goddard Space Flight Center, Greenbelt, Md. The science instrument was built by the Space Dynamics Laboratory, Logan, Utah, and the spacecraft was built by Ball Aerospace & Technologies Corp., Boulder, Colo. Science operations and data processing take place at the Infrared Processing and Analysis Center at the California Institute of Technology in Pasadena. Caltech manages JPL for NASA. More information is online at http://www.nasa.gov/wise and http://wise.astro.ucla.edu".MareKromiumOtt 01, 2010
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M-027-99.jpgM 27 - The "Dumbbell Nebula"114 visite"Tief verwurzelte und unbegründete Überzeugungen sind mehr als Lügen selbst die Feinden der Wahrheit."
(Traduzione)
"...Le convinzioni profondamente radicate e infondate sono, più ancora delle bugie stesse, nemiche della verità..."
Friedrich NietzscheMareKromiumAgo 27, 2010
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M-020-91.jpgM 20 - The "Trifid Nebula"110 visite"...La Libertà è come l'aria: si vive nell'aria; se l'aria è viziata, si soffre; se l'aria è insufficiente, si soffoca e se l'aria manca si muore..."
Luigi SturzoMareKromiumAgo 22, 2010
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M-076-6.jpgM 76 - The "Little Dumbbell Nebula"94 visite"He uses statistics like a drunk uses street lamps: as support, rather than illumination."
(Traduzione)
"...Costui utilizza le statistiche come un ubriaco usa i lampioni: ossia come supporto, piuttosto che come illuminazione..."
Andrew LangMareKromiumAgo 22, 2010
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M-008-93.jpgM 8 - The "Lagoon Nebula"154 visite"...Certe cose che una Generezione considera lusso, per la Generazione successiva sono necessità..."
Anthony Crosland
MareKromiumAgo 22, 2010
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M-087-8.jpgM 87 - Elliptical Galaxy with Jet171 visiteIf you drive, through the Silence,
Losing sight, going blind...
You can try, an experience
That will sure, blow your mind...
If you drive, through the Darkness,
Miss the light, of the Sun...
Lost in a Rain of Comets,
You can't tell where you are,
Sweat running down your helmet,
You've been driving too far, too far...
Getting tired, of Emptiness,
From your mouth, comes a shout...
Going wild, feeling helpless,
Out of track, no way out...
Lost on a secret mission,
You can't tell who you are...
You should have paid attention,
You've been driving too far, too far...
If you drive, thru the Cosmos,
Out of sight, out of time,
You will join, all the Heroes,
If you drive, one more time...
The Rockets - "If you Drive"MareKromiumMag 20, 2010
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M-072-0.jpgM 72 - Globular Star Cluster74 visite"...L'opinione è un'espressione dell'intelletto individuale che, talvolta, s'incorna con quella altrui.
Difendere la propria è un sacrosanto Diritto ed è segno di coerenza e di coraggio; deridere e/o disprezzare quella altrui, è un comportamento aberrante, segno di arroganza ed ignoranza..."
(estratto dal periodico "La Nuova Voce Giuliana" - Maggio 2010)MareKromiumMag 12, 2010
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M-066-0-HST.jpgM 66 - Spiral Galaxy90 visite"...My way of joking is to tell the Truth. Because the Truth is, very often, the funniest joke in the World..."
George Bernard Shaw (1856 - 1950)MareKromiumMag 05, 2010
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M-078-5.jpgM 78 - Reflecting Dust Clouds in Orion 76 visite"...Then God said, "Let there be Light!"; and there was Light..."
- Genesis, 1:3MareKromiumMar 03, 2010
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M-034-0.jpgM 34 - Open Star Cluster68 visite"...Integritatis fama alterum patrimonium est..."
(Publio Siro)
"...La fama (derivante dal possesso) di Integrità (Morale) è un secondo patrimonio..."MareKromiumFeb 11, 2010
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M-094-0.jpgM 94 - Spiral Galaxy108 visite"…Che quegli è tra gli stolti bene abbasso,
Che senza distinzione afferma o piega,
Così nell'un, come nell'altro passo;
Perch'egli incontra che più volte piega,
L'opinion corrente in falsa parte,
E poi l'affetto lo intelletto lega…"
Dante - Paradiso, 13, 115-120MareKromiumGen 15, 2010
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M-031~1.jpgM 31 - The "Andromeda Galaxy"70 visite"...The meteor seems to be hovering over a small town in Eastern Wisconsin..."
Dalla Serie TV "X-Files"MareKromiumGen 09, 2010
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