From ESOCast: An international team of astronomers using ESO’s Very Large Telescope has measured the distance to the most remote galaxy so far. This is the first time that astronomers have been able to confirm that they are observing a galaxy as it was in the era of reionization — when the first generation of brilliant stars was making the young Universe transparent and ending the cosmic Dark Ages.

We are going to find out how a team of astronomers used ESO’s Very Large Telescope, the VLT, to confirm that a galaxy that had previously been spotted in images from the NASA/ESA Hubble Space Telescope is in fact the most distant object that is ever been identified in the Universe.

Studying these first galaxies is extremely difficult; they are very faint and small and by the time their dim light gets to Earth it falls mostly in the infrared part of the spectrum because it has been stretched by the expansion of the Universe.

To make matters worse, at this very early time, less than a billion years after the Big Bang, the Universe was not completely transparent. It was filled with hydrogen which acted kind of like a fog and absorbed the ultraviolet radiation from the young galaxies.

So, holding the record for having measured the redshift of the most distant object in the Universe is not just a trophy to hang on the wall, it does have important astrophysical implications. This is the first time that we’ve managed to obtain spectroscopic observations of a galaxy from the era of reionization, in other words from the time when the Universe was still clearing out the hydrogen fog.

Despite the difficulties of finding these early galaxies, the new Wide Field Camera 3 on the NASA/ESA Hubble Space Telescope discovered several very good candidate objects earlier in 2010.

They were thought to be galaxies shining in the early Universe at redshifts greater than eight, but confirming the distances to such faint and remote objects is an enormous challenge and can only reliably be done using spectroscopy from very large ground-based telescopes.

The team was excited to find that if you combine the huge light collecting power of the VLT, with the sensitivity of its infrared spectroscopic instrument, SINFONI, and if you then use a very long exposure time you just might be able to detect the faint glow from one of these very remote objects and then go on to measure its distance.

A 16 hour exposure with the VLT and SINFONI of the galaxy UDFy-38135539 did indeed show the very faint glow from hydrogen at a redshift of 8.6, which means that this light left the galaxy when the Universe was only about 600 million years old. This is the most distant galaxy ever reliably confirmed.

One of the puzzling things about this discovery is that the ultraviolet radiation emitted by the galaxy does not actually seems to be strong enough to be able to clear out the hydrogen fog around the galaxy.

So one possible explanation is that there must be other galaxies, probably fainter and less massive neighbours, that helped ionize the hydrogen in the region of space around the galaxy, thus making it transparent.

Without this additional help the brilliant light from the main galaxy would have been trapped in the surrounding hydrogen fog and it could not have even started its 13 billion-year journey towards Earth.

Studying the era of reionization and the formation of the first galaxies is really pushing the capability of current telescopes and instruments to the limit. But, this will be exactly the type of science that ESO’s European Extremely Large Telescope will excel at. Once operational, this will be the largest optical and infrared telescope in the world.

Nguồn:https://madisonrep.org/

Xem Thêm Bài Viết Khác:https://madisonrep.org/cong-nghe

45 Comments

Bennybenasi

January 27, 2020

What went 'big bang'? If before the universe there was nothing, what went bang… there has to b a creator i can't believe this is all by chance without a good answer to my question

Reply

desi talent italy lovely

January 27, 2020

We don't even know who we are, from where we came. We don't know about our selves, how can we know about other incredible things in the space. We can't create any thing, even a grain of sand which can never burn. To find the god ,only we should find in our selves.

Reply

Eric Schweitzer

January 27, 2020

Absolutely FAKE!! Egads folks WAKE UP!! NASA are the Gate keepers to the Zionists/Freemason manipulation control system to recreate your reality! It’s all bullshit!

Reply

Drexel King

January 27, 2020

The most distant galaxy is literally up your ass and that's a fact when truly come to grips that we live in an enclosed flat world.

Reply

ronald bowerman

January 27, 2020

This just dosn,t make sense they say a galaxy is and heading our way and will meet us in a billon years or more , when its been proved that all and every thing is moving away from the earth and expanding, so someone must be wrong.

Reply

Linda Fowler

January 27, 2020

God is a magnificent Creator!

Reply

Manuel Ochoa

January 27, 2020

Picture this, planets develop equally. It took the world millions of years to form no? Now lets look at an object millions of light years away. Wouldnt that mean that the light we see is millions of years old? It took the image millions of years to get here. The planet would still develop while the light is traveling. They could possibly be as developed as us by now for all we know. Right?

Reply

Manuel Ochoa

January 27, 2020

Lets say we populate a planet 1 light year away. Does that when one planet observes the other they would see an image from a year back since it take light a year to travel?

Reply

Kishanth Koushik

January 27, 2020

imagine if you had instant teleportation there that'd be cool!

Reply

reckit ralph

January 27, 2020

Surely with the big bang theory they have looked for a large amount of early galaxy's to try to pin point exactly where it happened .

Reply

topgeardel

January 27, 2020

So silly. We sound so "impressive" talking about the Infinite. Big Bang? Are you sure? The Earth isn't even a grain of sand in the ocean when compared to the known, let alone unknown Universe.

Reply

Adam Kucharski

January 27, 2020

Wow!

Reply

Guniss Seecharan

January 27, 2020

Do you guys know what you are talking about or just relying on previous assumptions that the universe Began with a Big Bang and everything else is naturally assume to be guided by this theory..you all are so wrong.one day after my time and years to come it will be proven that the Big Bang never happened but what actually happened was the formation of dark matter fist throughout a large part of the universe then ,which went on to become so saturated with energy that it started simultaneous process of combustion creating sparks of gas and dust that went on to become galaxies.thus the trillions of galaxies we have today and this process of the formation of dark matter continues outside the un observable universe and this process of combustion continues to give birth to galaxies and the expansion of the galaxies. And btw how it is that one day actually 13.8 billion years ago that the Big Bang decided to happen,why not 20 billions years ago or why not 10 billion years ago. We are only speaking stupidness that the universe began 13.8 billion years ago because that’s how long light from the furthest point has taken to reach us.what make us think that the earth is the center of everything .no. Galaxies are still being born today and it’s nit because of one Big Bang but it makes more sense that sometimes is causing the universe to expand and move away from us and that something is dark matter.and dark matter is causing more births if new galaxies.its just we can’t see that far out as yet but we will soon one day.thx

Reply

Juan Carlos Montiel Perez

January 27, 2020

In spanihs please!

Reply

Punnasa Mamao

January 27, 2020

Wow !

Reply

John

January 27, 2020

What if Mars has giant spiders living under the surface and they love eating bananas

Reply

Leslie Killam

January 27, 2020

Amazing.

Reply

Secret Name

January 27, 2020

They found the Doctors Galaxy.

Reply

David Stapley

January 27, 2020

Brilliant thanks

Reply

Fortydroid

January 27, 2020

I love the telescope names though

Reply

Chief Seadawg

January 27, 2020

Can't wait for the ELT to start taking images in 2025. It promises to be a truly stunning observatory.

Reply

ej napa

January 27, 2020

What a load of garbage. Anyone believing this shit needs to be certified totally programmed.

Reply

Roscoe Brown

January 27, 2020

This makes me feel Puny ! Like we live on a grain of sand on a beach and the nearest talking grain of sand is 20 miles down the the beach under a grunion thats about ready to be eaten by a seagull so its too busy to talk right now Do we really want to deal with that ? Going all that way to find out they have issues ? Well DO WE????

Reply

Renae A.

January 27, 2020

Look up GN-Z11. is the newest most distant Galaxy ever discovered redshift of 11.1 I believe

Reply

George Kanev

January 27, 2020

The age of universe depends by our ability of penetration to “see” deeply and deeply in the over space i.e. by our instruments for observation only:
First empty space doesn’t exist and if we sink into the space of atom and become part of it, then size of nucleus will increases almost to the size of first electronic orbit, so the atom will looks very differently than the Rutherford dispersing and more and more will looks like a galaxy…why? see USM www.kanevuniverse.com According to this theory the galaxies in our space are atoms (nuclei) in the over space…why it is so and what really are this two spaces You can see on the site. So when we observe some extremely phenomenon in our space of galaxies, we need always to imagine the processes in our atoms space and that are quantum activation, collisions between atoms and nuclear particles, swallowing and radiation of waves, which have frequency in the over space in accordance with efficient of time connection between the spaces, see part II USM www.kanevuniverse.com That is in force about the decision on the age of the galaxies which we observe from our position of observation the Sun and it is means that firstly we must to decide whether there are some energy stimulation in accordance with above and then to decide which galaxy is older and which is younger.
How much we penetrate within the over space where according to Undivided Structure of the Matter www.kanevuniverse.com galaxies in our space are atoms (nuclei) on the over space? The answer is: ~〖10〗^9 [light years].〖10〗^18 [cm]=〖10〗^27 [cm]→[divided by the constant of time,see part II USM]
→(〖10〗^27 [cm])/(〖10〗^31 [folds] )=〖10〗^(-4) [cm]
Or we penetrate only one micrometer 〖10〗^(-6) [m] within the over space! G.Kanev

Reply

Arthur Rogers

January 27, 2020

Are they looking at our place

Reply

Anti-Gylala Community Member

January 27, 2020

When you realize this video was made in 2010

Reply

Time Bandit

January 27, 2020

They never said how far it is! Huge let down.

Reply

milo lee

January 27, 2020

Man…some of the words used in this video!..
I tried looking up some of these words.first word I picked up?.. Spectroscopy.
Took me sooo damn long to type the word,that I gave up!
I'll stick with earth,moon and the sun for now!
Peace

Reply

John Marston

January 27, 2020

Imagine if that galaxy somehow still exists and theres life there being like ”the milky way is the furthest away galaxy ever.

Reply

Drexel Morrison

January 27, 2020

VLT VATICAN'S LUCIFER TELESCOPE,MOST POWERFUL IN THE WORLD WHY DO THEY HAVE IT ? WHAT ARE THEY LOOKING AT,? ENOCH'S WATCHERS.????

Reply

ADE 1960 ehrh

January 27, 2020

I bet the inhabitants of that galaxy don't consider it the farthest!

Reply

rancid sausage

January 27, 2020

What i dont get is the furthest we can see is the so called start of the visable universe but what about further out where we cant see? Wouldnt that be earlier? They say that there is plenty of universe outside of our visible universe so why does astronomy always contradict itself?

Reply

Christoph Messner

January 27, 2020

So when it is 13 billion light years away and we look into the other direction also 13 billion light years, is the universe 26 billion light years wide or do we see the sane galaxy in the other direction?

Reply

Le Michael

January 27, 2020

nhung thien ha mo rong, va gop lai voi' nhung thien ha khac', nhung thien ha dieu co' lo den o trung tam de don dep nhung~ he sao sap' chet', va ngoai`ria` dai thien ha` tao ra he sao moi'
nhung he sao do' dang' va ong troi` sky tao ra nhung he sao hap' thu vat chat' toi' hinh thanh` he sao,va` the' xoay vong va di vao` tam lo den cua thien ha` va` chet',ong troi tao ra he sao 7 ngay`

Reply

Jeevan M Adyapady

January 27, 2020

waw amazing

Reply

P T

January 27, 2020

👽: "Good luck, humans. Good guess, btw."

Reply

Fred Postma

January 27, 2020

The universe started when i was born 01091963

Reply

Fred Postma

January 27, 2020

They know So much about it nowadays; amazing

Reply

Tom Meyers

January 27, 2020

The Most po0py sidewalks in California…. So Far

Reply

Abcde Kh

January 27, 2020

sophan allah

Reply

11B10 Inf

January 27, 2020

Theory..
Conjecture, speculation, supposition, ect…!
No one in this world was witness to anything 13.5 billion years ago.
That fact still remains that you know nothing at all about the universe and its origin. What you say today, is bullshit tomorrow. That's why encyclopedias are extinct. As humans soon will be. Thank the stars.

Reply

Bennelyn Matudan

January 27, 2020

Um its actually now Gnz-11 a galaxy with the redshift of z= 13.96

Reply

1Galan

January 27, 2020

There was no big bang lol

Reply

jessie pengyasen

January 27, 2020

One thing i never believe is the big bang theory,anyway its only a theory of an idiot guy…

Reply

Leave a Reply