Most distant known object in universe discovered

San Diego Union-Tribune ^ | February 15, 2004 | Andrew Bridges

[stripes1776]

...a team of astrophysicists announced Sunday they have spied a tiny galaxy that is the most farthest known object.

I guess that means that this thing is beyond the farthest know object. That must be really far. But if it is beyond the farthest know object, how do they know it exits?

[PatrickHenry]

From the article:

The team was less confident about the precise redshift they had measured, estimating it as between 6.6 and 7, Ellis said. Any value in the range would still place the galaxy as the farthest known object, he added.

How fast would that be traveling, with respect to us?

[Solamente]

NASA has aborted a service/upgrade mission to Hubbell, even though it's already paid for and the parts are ready!

http://hubble.stsci.edu/newscenter/newsdesk/future/

There's a petition link within the article....

[xzins]

I have trouble figuring my income tax.

Maybe we can get astronomers to figure that one out.

[longshadow]

How fast would that be traveling, with respect to us?

I don't know the formula to convert redshift to recessional velocity offhand, but at a value of z = 7.0, it's more than 90% of "c" for sure.....

[longshadow]

How fast would that be traveling, with respect to us?

Found it.....

v/c = [(z+1)^2 - 1]/[(z+1)^2 + 1]

for z = 7.0. that's equivalent to v/c= 97% of the speed of light.

[Chris Talk]

They will never tell me that is all uninhabited.

[PatrickHenry]

... 97% of the speed of light.

Thanks.

[PoorMuttly]

Shaggy...they're on to us.

Activate Plan-C.

Repeat...Activate Plan-C....

[Skooz]

Amazing.

Astronomy makes my head explode.
If I could do simple physics and advanced algebra, I would have been an astronomer.

Imagine doing this for a living. Nothing could be more cool.

[Lee'sGhost]

Damn, you beat me to it.

[shaggy eel]

,,, when you wish upon a star it makes no difference who you are.

[edwin hubble]

"Peering back in time to when the universe was just 750 million years old, ... roughly 13 billion light-years from Earth."

Some of the latest estimates (UCLA) place the age of the universe at 13 to 14 billion years.

(developed from the age of the chemical elements, oldest star clusters, and the age of the oldest white dwarf stars).

So, the time-and-distance data in this article is roughly consistent.

[Lee'sGhost]

Forget the most distant object! What the hell is that giant white ring! It could only be made by an intelligent species.

[John W]

I enjoy these stories and threads as much as anyone.However,isn't this a potentially fleeting title,if not just plain bogus.I mean,there was a different "farthest KNOWN object " before this one,and it probably won't be the last.

[PoorMuttly]

...better find a spot beyond it..I guess...as usual.

Why can't they leave us alone ?!

Where's a feller s'posed to hide his stuff these days ?!

Maybe the Martians are right...if they finally get there...dismantle their stuff...but let some of it drive around in circles on your vacant movie set.

[reagan_fanatic]

What a beautiful picture.

God's handywork is amazing.

[longshadow]

Thanks.

No charge..... but there will be a pop quiz tomorrow!

BTW, there is no value of z (redshift) for which the recessional velocity is equal to "c." That's because if the emitter were receding from us at v=c, the redshift would be infinite, and the photons would have no wavelength at all! Basically, we can't see anything that's receding that fast (or faster). That's what defines the limit of the visible Universe, the space inside of that limit is known as the Hubble volume.

So, in the limit, as z -> infinity, v -> c.

[concentric circles]

"...white ring..."

The gravity from the cluster warps the light from galaxies located behind the cluster. They end up looking like arcs of light. Numerous galaxies beyond the cluster results in numerous arcs and the appearance of a ring.

As Lincoln said, "I can see how it might be possible for a man to look down upon the earth and be an atheist, but I cannot conceive how he could look up into the heavens and say there is no God."

[ngc6656]

Know anything about the small blue image in the approximate center of the image?

Noticed and was wondering about that object myself. Structurally it appears that it could be two galaxies in collision. But why does it appear so blue? It appears too small to be a foreground object the size of galaxies. If at the distance of the galaxy cluster and appearing that color, it would be in the ultraviolet portion of the spectrum if it were nearby. Curious object.

Another thought: if it is two galaxies in collision, there may be a a burst of star formation activity taking place. Young, massive stars are extremely hot, emitting blue and violet light.