One for Mike to image - the oldest galaxy

[cybereye]

Hi all!

I've just seen this article - maybe Mike could try and image it!:D

Most Distant Galaxy Discovered (http://www.news.com.au/world/breaking-news/most-distant-galaxy-discovered/story-e6frfkui-1226745643254)

Cheers,
Mario

[mental4astro]

Heard anout it on the ABC radio. Wanna read something funny? The news reader said:

"A 30 billion light year distant galaxy, whose light left the galaxy 700million years ago. "!!! :rofl: :doh:

The most stupid thing I've heard for a while from the ABC, who are pretty good on the whole. Science department must have been on their coffee break so they didn't see it before it was cleared for broadcast. ..

[renormalised]

They're journo's, Alex. It's par for the course :) :P

Or, maybe the light was in a hurry :) :P

[ZeroID]

Rolfs probably already shot it, .... in depth,... and colour.

C'mon Rolf, fess up !!

:D

[Baddad]

Hi Alexander,:)
That journo' can't read. Maybe he lost his notes.
:lol::lol: Re: Light in a hurry:lol::lol:

Cheers:)

[SkyViking]

Lol, Brent :) Yeah I've got it here of course but just didn't want to post the image until I'd finished counting how many of it's globulars I picked up... :lol:

Hmmm, I wonder what magnitude it has, from memory I believe HST regularly reaches to mag 29-30, and some of the large observatories go beyond that. It must be extremely faint.

[Robh]

Reminds me of an article I read a few years back ...

http://www.nasa.gov/mission_pages/hubble/science/ancient-object-gallery.html

Except it claims to be an older galaxy than this new one!

Regards, Rob

[strongmanmike]

Nah gave up after I heard Rolf did a 1000hr exposure and still didn't record it....ooops did I just plant a seed :doh:

:lol:

[sjastro]

I think what the ABC article was trying to state (albeit a complete stuff up) is that the galaxy was formed 700 million years after the BB say around 13.1 billion years ago.
In the time taken for the photons to reach us, the size of the Universe has expanded to a degree that the object is around 30 billion light years distant.

Regards

Steven

[gregbradley]

Interesting. So when we say a galaxy is say 100 million light years away it is incorrect to say the light we recorded is 100 million years old. Because the galaxy has most likely moved further away during part of that time so it may have been closer when it was emitted and the galaxy is now further away. But then we use received light to work out how far away something is so that distance as in the above example of 100 million light years would be the elapsed time and the galaxy may in fact in present time be much further away.

Greg.

[sjastro]

Hi Greg,

When we observe a galaxy 100 million light years away, we are observing the galaxy as it existed 100 million years ago which also includes its distance at that time.
Its current distance is 100 million light years plus how far it has moved from us in the last 100 million years.
How far the galaxy has moved is a complicated affair and depends on factors such as the geometry of the Universe and the gravitational effects of any nearby galaxies.
Galaxies in our own Local Group exhibit what is known as "peculiar motion". M31 in fact is moving towards us.

Regards

Steven

[simmo]

whoops Should read things a little better.

[Ric]

That is truly a galaxy far far way as they say in the classics. :D