Starship Asterisk*

That makes sense. However, I suspect that this doesn't reflect the known position of any of the objects, but is simply a statistical distribution based on size, color, and the fact that the volume of space in this image is greater for objects seen earlier in the Universe. I vision the galaxies when...

Bystander write: ErnieM wrote: Is this the only sweet spot Hubble is able to see galaxies as young as 13 billions years ago? Are we looking towards the direction of a long (13 billion years) elongated tapering tube of a Picard horn shaped universe? The farther we are able to see, space are more comp...

Is this the only sweet spot Hubble is able to see galaxies as young as 13 billions years ago? Are we looking towards the direction of a long (13 billion years) elongated tapering tube of a Picard horn shaped universe? The farther we are able to see, space are more compact and dense hence the red-shi...

Chris wrote:Aug 25 Actually, it is more accurate to consider the surface of the observable universe to be t=0. (1) The moment of the Big Bang does not lie outside the observable Universe, only outside that part which we can observe with electromagnetic radiation. (2) The CMBR is the surface of that ...

Chris wrote: Actually, it is more accurate to consider the surface of the observable universe to be t=0. The moment of the Big Bang does not lie outside the observable Universe, only outside that part which we can observe with electromagnetic radiation. The CMBR is the surface of that sphere, which ...

bystander wrote: Yes, we are inside the sphere looking out at the edge of our observable universe, but t=0 lies outside that sphere, in all directions. Are we also to infer that the source of CMBR lies outside the sphere in all directions? How is this possible? Where is this going to take us? Perhap...

Thank you Chris. Reading this, I now imagine a spherical CMB and we are inside the sphere looking in all directions, hence "all sky map". Then when I clicked at the Pixelization heading, it shows a model of the Earth topography and the CMB radiation temperature anisotropy as surfaces of sp...

From Wikipedia: The Wilkinson Microwave Anisotropy Probe (WMAP) – also known as the Microwave Anisotropy Probe (MAP), and Explorer 80 – is a spacecraft which measures differences in the temperature of the Big Bang's remnant radiant heat – the Cosmic Microwave Background Radiation – across the full s...

This article "Herschel Measures Dark Matter for Star Forming Galaxies" answers all the questions I raised on this discussion. http://www.nasa.gov/mission_pages/herschel/herschel20110216.html This gives me a new and more logical understanding of stars and galaxy formation and the important ...

Chris wrote: While I do think that the Universe cannot have a center of gravity in three dimensions, I don't see what the size of the Universe has to do with the question. Any massive three-dimensional structure of less than infinite size has a center of gravity. The reason the Universe doesn't have...

Chris wrote: This is a ten-year old article. It would be interesting to check up on what these researchers have published recently. In any case, however, this is all made confusing by conflicting terminology. In general, a "dark matter galaxy" these days refers to a hypothetical isolated g...

I watched this video titled "How Large Is the Universe" http://www.youtube.com/watch?feature=player_embedded&v=CEQouX5U0fc In it, it is estimated that the whole universe is so large that my original questions "Does the Universe have a Center of Gravity" Where is It?" tha...

Chris wrote: The bubble universe idea discussed in this article, however, bears no relation to what you previously described using that term. In this model, nothing changes with our current cosmology- we are still in a 4D spacetime universe that started with the Big Bang. Dark matter and dark energy...

Bystander wrote: I would like to remind the readers that this board concentrates on the mainstream or consensus view of cosmology. Alternative theories, conspiracy theories, and pseudoscience are not discussed here. Chris wrote: But unless you can back up your idea with supportive evidence, it stand...

Chris wrote: The universe you are talking about doesn't match either our theory or observation of the actual universe we live in. All theories about anything are products of human imagination. There are many theories on the shape of the universe and until proven otherwise, the bubble universe I desc...

Chris wrote: This universe can be modeled as a balloon that is expanding. The center of the universe is the center of the balloon- that's where the Big Bang happened, at t=0. As the universe expands, its surface moves away from that center. Nothing on the surface (which is "now") can see t...

Chris wrote: The Universe is not a three-dimensional structure, but a four-dimensional one. It has a precise center, which coincides with t=0 (the 4D point where the Big Bang originated). In three dimensions, any point can be considered the center, and it is conventional to treat the position of the...

No, it will tell us nothing about what the future universe will be like. We will see just what we see now: no matter how near or how far, the distribution of galaxies is uniform. We don't see them bunched up, and we wouldn't expect to. Seeing back a little farther isn't going to change our understa...

Chris wrote: because we only see objects once. No argument about this. The images of these very young galaxies are what they looked like and their location at the time as close as possible to the moment of the big bang. Where would we find these young galaxies? Would they be bunch up closer together...

Chris wrote: ErnieM wrote: Chris wrote: we aren't seeing the galaxy being born How would anyone know that he or she is witnessing a galaxy being born, 13 billion years ago or last year? How would the image look like? Is the James Web telescope equipped with instruments to detect such events? Nobody ...

Chris wrote:

we aren't seeing the galaxy being born

How would anyone know that he or she is witnessing a galaxy being born, 13 billion years ago or last year? How would the image look like? Is the James Web telescope equipped with instruments to detect such events?

This Nasa article describes the oldest planet in our galaxy estimated to be 13 billions years old. http://www.nasa.gov/home/hqnews/2003/jul/HQ_03234_Oldest_Planet.html This article on Nature shows the oldest galaxy so far detected by Hubble is 13.2 billion years old. http://www.nature.com/news/2011/...

Chris wrote: I don't think so. What happens is that the Sagittarius Dwarf Galaxy is gradually absorbed into the Milky Way- a type of merger that occurs all over the Universe. Nothing is going dark, and there's nothing to suggest that the dark matter of the SDG will remain distinct from the dark matt...

Chris wrote: ErnieM wrote: Let us take a broader look at the evolution process of galaxies and let me present another way a galaxy can go dark. In the merging process of two or more galaxies, the dominant galaxy or galaxies eats up all the ordinary matter from the weakest one leaving only the dark g...

This is an entirely different thing. If dark matter galaxies exist, they are not galaxies that went dark. There hasn't been enough time for galaxies to go dark. This Wikipedia article is about hypothetical galaxies made from dark matter only. While interesting, I don't see the connection between th...