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New Spitzer images reveal: M33 is bigger than we thought and moving towards us

NASA's Spitzer Space Telescope recently captured this new image of the galaxy M33, known as the Triangulum Galaxy, and the scientists were surprised to discover that the amount of "cold" material that is difficult to see from other telescopes is scattered over great distances from the galaxy's disk.

The galaxy M33 by the Spitzer Space Telescope, 2009
The galaxy M33 by the Spitzer Space Telescope, 2009

NASA's Spitzer Space Telescope recently captured this new image of galaxy M33, known as the Triangulum Galaxy, and released it as part of an eighty-telescope around-the-world project that took place last week as part of the International Year of Astronomy events.

Besides the beautiful colors, the new image reveals new details about M33 - and it turns out that there are more interesting things than meets the eye. M33 is located 2.9 million light years from Earth in the Triangular group. It is a member of what is known as our "local group of galaxies". Together with the Milky Way and Andromeda, the group has about 50 galaxies that move together in the universe, and are bound to each other by gravity. In fact M33 is one of the few galaxies moving towards the Milky Way despite the fact that the universe is expanding, which causes most galaxies in the universe to move away from each other.

The new image reveals that M33 is surprisingly larger than can be seen in visible light. Thanks to the ability to detect cold and dark dust, Spitzer can see emissions from much colder materials outside the visible range of the M33 disk. How exactly does the cold matter move out of the galaxy? These details are still mysterious, but wind from large stars or supernovae may be the possible causes.

The image consists of three-color photographs and captures what was seen by two instruments in the infrared field on the spacecraft. The stars look like glittering gems (some of them are ones in our galaxy from before M33) while the dust rich in organic molecules glows green. The bright red-orange regions represent star-forming regions, while the red spots outside M33's spiral disk are almost certainly galaxies in the distant background.

From the technical point of view - the blue parts in the image represent a combination of light in the 3.5 and 4.5 micron range, and the green - light in the 8 micron range, both taken with Spitzer's infrared camera. The red is light in the 24 micron range and is imaged in the multichannel imaging photometer.

For the news in Universe Today

23 תגובות

  1. I am,
    You probably don't realize that if you have infinite options, then infinite time might be enough to get all options at most once, and that's not certain either.

    Because as long as time continues, more and more universes will be created, and more than one at the same moment (because the universes "split" not only into 2, but for every decision or statistical moment there is usually more than one option, maybe even infinity). Therefore the number of options approaches infinity at a higher speed (a certain power for example or exponentially more correctly), while time is not exponential but continuous (approaches infinity more "slowly").

  2. to Oren -
    Infinity is "enough time" for an event with zero probability to happen twice...

  3. I am,
    Not quite what you said at the end. Because there are endless possibilities for different universes. Every choice not only of yours, but of any animal or other statistical process, is itself statistical. I'm trying to say that there are an infinite number of possible universes. And so even if you repeat the process of the formation of the universe countless times (not that I am saying I support the idea) this does not at all guarantee that even one of the "evolutions" of a certain universe will repeat itself. There is a chance it will come back, and even then not high at all if not zero.

  4. It may also be that galaxy clusters are themselves within superclusters that are actually moving towards each other.

    who knows?
    It makes sense to me that once in a while all the matter in the universe collapses into one place and then explodes again and starts all over again.

    DA, if this is true, and it is indeed a cosmic process that repeats itself once, let's say a thousand billion years (just throwing out a number...) then someday all history will repeat itself, because statistically, if the universe exists in such an infinite cycle, then the chances of something happening are infinite times is 100 percent.

    think about it!

  5. Thank you all for the explanations.. and what to do in every group there are those that require improvement or renovation..

  6. Shabbat Keeper:
    You get the impression that you don't know you
    The reason why you even keep Shabbat.
    They told you father guard, grandfather guard, guard and don't ask why.

  7. someone else entirely,
    In addition to what my father said - the force of attraction between close bodies is strong and the effect is great enough for them to attract each other (the strength of the force of gravity is inverse to the distance between them) despite the acceleration of the universe.

    So what we actually see is that when the universe expands and accelerates the bodies basically move away from each other except in certain areas where the bodies are close enough to be affected by the force of attraction between them.

    Try pushing strong enough magnets that are connected to each other. Although in itself each magnet is a separate body, because of the attraction between them they stay together and do not separate (unless you give a strong enough push or the magnet is not strong enough). The same thing happens to galaxies

  8. M33 is a satellite galaxy of Andromeda. According to what is known so far, Andromeda and the galaxies associated with it by gravity are approaching the Milky Way and will probably merge within a few billion years. As explained, both the Milky Way and Andromeda belong to the local cluster of galaxies. Those who move away from each other are the clusters. Within the clusters, a collision between galaxies is still possible and such collisions are not rare as can also be seen in many articles on the website describing research on the subject over the last decade.

  9. On the one hand we are told that the galaxies are moving away from each other and the universe
    The familiar will spread forever - until perhaps everything separates into atoms,
    On the other hand, two galaxies (at least Andromeda and M33)
    Approaching the Milky Way - and we know super collisions
    Other galaxies that for some reason are approaching each other. Is there
    Who can say what is really going on here?

  10. For some reason the picture in the article reminds me a lot of the Cancer Nebula M1 and not the spiral galaxy M33
    Check if there is a mistake?
    Apologies if I was wrong
    Happy holiday to everyone
    Sabdarmish Yehuda

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