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NASA Sees Glow of Universe's First Objects

Posted by kdawson on from the first-post dept.

Damek writes with news from NASA's Spitzer Space Telescope, which has captured light from what may have been the first glowing objects in the universe, light generated 14 billion years ago. From the article: "'We are pushing our telescopes to the limit and are tantalizingly close to getting a clear picture of the very first collections of objects,' said Dr. Alexander Kashlinsky... 'Whatever these objects are, they are intrinsically incredibly bright and very different from anything in existence today.' Astronomers believe the objects are either the first stars — humongous stars more than 1,000 times the mass of our sun — or voracious black holes that are consuming gas and spilling out tons of energy. If the objects are stars, then the observed clusters might be the first mini-galaxies..."

6 of 327 comments (clear)

  1. Worlds largest telescope comes on line by LiquidCoooled · · Score: 5, Funny

    Focusing on glowing objects...

    "Ahhhh, I can see what it says!"

    "What is it?"

    "Its a sign of some kind!"

    "A sign?, what does it say?"

    "Look out behind you!"

    --
    liqbase :: faster than paper
  2. Looks like this is already being refuted by Anonymous Coward · · Score: 5, Informative

    by some more powerful equipment. From New Scientist Space: "Because Hubble's mirror is larger than Spitzer's, it turned up dwarf galaxies too faint for Spitzer to resolve. "Once we remove pixels in the Spitzer images corresponding to the locations of these galaxies, the background infrared light level mostly disappears," Cooray told New Scientist. 'We think, therefore, the infrared light seen in Spitzer images is mostly due to the faint infrared glow from these dwarf galaxies.'" The full article

    1. Re:Looks like this is already being refuted by pln2bz · · Score: 5, Insightful

      This story is very typical of space stories these days. You get some speculation from some scientists about what they expect that they should be seeing, tenuously based upon some weak observational data. A public release is put together and the news story gains steam because it invokes some concept that tickles the imagination of the public (gigantic black holes and stars, for instance). Then, when better observations come in and suggest that maybe we shouldn't be so sure of our prior speculation, there is little effort to correct the record.

      It was interesting to observe that this (probable) garbage made it onto Slashdot, whereas the Stardust mission results (with actual data) did not. It seems that the space news cycle is caught in a competition to make the most outlandish claim possible in order to get the attention of the public these days. Investigating anomalies within the current paradigms has taken a backseat to wild speculation. There's little interest anymore in questioning the early assumptions that got us to this point in the first place:

      Our conviction in stellar birth by way of gravitational collapse survives observations of R Corona Australis, which is generating enigmatic x-rays and 100 million degree F temperatures at a very early stage of the supposed collapse (http://www.thunderbolts.info/tpod/2005/arch05/050 304starbirth.htm).

      Our conviction in our theories about supernovae survived observations of Supernova 1987A (see pictures at http://www.thunderbolts.info/tpod/2006/arch06/0601 24solar3.htm), which defied traditional theories about supernovae in nearly every single respect. Even though plasma physics tells us that we can understand the structure we see in those images down to the number of beads in the smaller ring, we continue to ignore those explanations because they involve electricity in space.

      Our conviction in the theory of black holes was not dampened at all by the associated problems with generating the observed quasar jet 3C273 (http://www.holoscience.com/news.php?article=9kpgc 4td), which extends 100,000 light years -- even though the lifetime of the X-ray producing particles is only about 100 years.

      And then there's the Stardust mission -- which when combined with the results of the Deep Impact mission indicate quite clearly that our early assumptions about comets were quite wrong. Scientists are now apparently trying to invent scenarios for how it could be that comets would contain exotic meteorite particles as well as particles that have clearly been formed under intense heat. Perhaps they should consider that these initial speculations were wrong in the first place. I doubt we'll see any such sanity though. More likely, we'll see additional new speculations to support the earlier unsupported speculations.

      There increasingly seems to be far less glory these days in doing the homework that we'll be graded on and far more interest in fantasizing about multi-dimensional space and gigantic black holes.

      --
      "A man cannot begin to learn that which he thinks he already knows." --Epictetus, 1st Century A.D.
  3. Re:Please explain by Gospodin · · Score: 5, Informative

    A good way to think of it is to imagine us as living on the skin of a balloon as it is being blown up. You are moving away from every other point uniformly, but you aren't near the "edge".

    In more physics-friendly language, there are only two possibilities - either the universe is open or it's closed. If it's open, then it's infinite in all directions and there is no edge (we don't think this is the case, but it's still technically possible). If it's closed, then there simply is no edge because as you travel in any direction you curve around to head back where you came from.

    It might also help to realize that while the visible universe may be "only" 14 billion light years or so in radius, the longest dimension of a closed universe could be several times this number due to inflationary expansion. So we may not be seeing everything that's actually out there.

    --
    ...following the principles of Heisenburger's Uncertain Cat...
  4. Re:Almost there... by MillionthMonkey · · Score: 5, Informative
    RTFA FIRST- in reality they're looking at stuff only 13.2 billion light years away, not 14 billion- which would indicate light that was older than the universe itself at 13.7 billion years old
    The actual horizon is 53 billion light years away, not 13.7. Consider a photon emitted very early, when the universe was still small, that reaches Earth today. During the first year of that photon's life, it would crossed only one light year of space on its trip to us- the first one.

    13.7 billion years later, that first light year has expanded like a rubber sheet to have a disproportionate contribution to the 53 billion, compared to light years that the photon covered later on, just before reaching us. You can't just multiply the total elapsed time by c. You have to actually do an integral over time for the entire trip to get the 53 billion, where the integrand is the product of c by the "stretch factor" S(t) at that point on the trip: the factor by which the space that a photon was flying through at time t has expanded by now (as considered relative to a frame where the Earth is at rest). I don't know what this function would be, but I do know it's a function of time (or more specifically, time since the Big Bang in a frame at rest with respect to the microwave background radiation).

    If S(t) were fixed at 1.0, you'd expect an integral of 13.7 billion light years. But it isn't fixed at 1.0; it is always greater than that and only approaches 1.0 at the end since light years at the end of the trip haven't had much time to expand. At the start of the trip S(t) could have been very high, depending on the age of the universe at the time.
  5. Re:Almost there... by snarkth · · Score: 5, Interesting


      The expansion of space itself is not constrained by the speed of light, only the matter/energy within it.

      Read Inflation for Beginners which is an excellent, relatively (argh) non-technical treatment of the subject.

      Relevant quote: "One of the peculiarities of inflation is that it seems to take place faster than the speed of light. Even light takes 30 billionths of a second (3 x 10(exp-10) sec) to cross a single centimetre, and yet inflation expands the Universe from a size much smaller than a proton to 10 cm across in only 15 x 10(exp-33) sec. This is possible because it is spacetime itself that is expanding, carrying matter along for the ride; nothing is moving through spacetime faster than light, either during inflation or ever since. Indeed, it is just because the expansion takes place so quickly that matter has no time to move while it is going on and the process "freezes in" the original uniformity of the primordial quantum bubble that became our Universe."

      I don't know what you mean by "information coming from apparently nowhere."

      snarkth