Hubble Finds a Galaxy 12.8 Billion Years Old

I Don't Believe in Imaginary Property writes "Hubble's Near Infrared Camera and Multi-Object Spectrometer (NICMOS) has discovered the 12.8B year old galaxy now known as A1689-zD1. Using gravitational lensing of the massive Abell 1689 cluster of galaxies, they were able to find a surprisingly bright young galaxy from only 700 million years after the Big Bang, during the cosmic 'dark ages.' Researchers are itching to study the object with the upcoming Atacama Large Millimeter Array (to go online in 2012) and James Webb Space Telescope (to launch in 2013)."

Comments

Probably Doesn't Exist

[Prien715]

Even more interesting, I think, is the fact that since it's over 12 billion light years away, it probably doesn't exist anymore. We are in fact looking at ancient history. It could have developed "intelligent" life and they in turn, could've blown it and themselves up in some sort of "ideological" dispute.

And in a few billion years, we'll get to watch it "live".

Re:Do they cut it in half and count the rings?

[Mantaar]

Since c is most likely a constant we can say: something that is x light years away is y years old (actually, x = y for most cases, I think.). How do we measure the distance between our galaxy and another? No rocket science (but [theoretical] astrophysics):

http://hubblesite.org/reference_desk/faq/answer.php.id=45&cat=galaxies

Though I have no idea how exactly they did it this time. That's just the general procedure. According to TFA that's just an estimation and the exact age of the galaxy is yet to be determined; that's what those new telescopes would be useful for.

What's even more interesting though:

The astronomers used a relatively nearby massive cluster of galaxies known as Abell 1689, roughly 2.2 billion light-years away, to magnify the light from the more distant galaxy directly behind it. This natural telescope is called a gravitational lens. Remember: when you're glancing through space, you're not only taking a look at the 3 space dimensions, but the 4th, time, actually starts playing a role. The sun could explode right now and we would only notice it in about 8 minutes...