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Thread: Astronomy

  1. #991
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    2 links today: this one on the lunar orbiter: https://www.universetoday.com/135778...-right-camera/

    and this one on Juno, continuing to surprise us: https://www.universetoday.com/135765...found-jupiter/

  2. #992
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    The Big Bang Theory

    This is the clearest explanation I have found of the Big Bang Theory:

    https://www.universetoday.com/135791...iest-universe/

  3. #993
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    Astronomy

    This is what resides at the centre of the Milky Way Galaxy: a supermassive black hole. Read about it here:

    https://www.universetoday.com/135799...event-horizon/

  4. #994
    On the road, but not! Danik 2016's Avatar
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    Just read the link on Jupiter- Stunning data. Never thought of Jupiter as a stormy planet.
    "I seemed to have sensed also from an early age that some of my experiences as a reader would change me more as a person than would many an event in the world where I sat and read. "
    Gerald Murnane, Tamarisk Row

  5. #995
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    Astronomy

    I think most planets are stormy, and many moons are, too.
    Last edited by Dreamwoven; 06-02-2017 at 10:32 AM.

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  7. #997
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    Interesting article about Neutron planets, but the adds bar that doesn´t close is anoying.
    "I seemed to have sensed also from an early age that some of my experiences as a reader would change me more as a person than would many an event in the world where I sat and read. "
    Gerald Murnane, Tamarisk Row

  8. #998
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    "Icy Water Worlds That Might Host Life

    Alien life may be lurking right in Earth's cosmic backyard. Some of the icy moons of Saturn and Jupiter are known to harbor subsurface oceans that could provide habitable environments."

    http://www.space.com/35469-solar-sys...fographic.html
    "I seemed to have sensed also from an early age that some of my experiences as a reader would change me more as a person than would many an event in the world where I sat and read. "
    Gerald Murnane, Tamarisk Row

  9. #999
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    Quote Originally Posted by Dreamwoven View Post
    This is what resides at the centre of the Milky Way Galaxy: a supermassive black hole. Read about it here:

    https://www.universetoday.com/135799...event-horizon/
    It is interesting that these scientists doubted the existence of the event horizon given current gravitational theory. I would have thought that black hole and event horizon were two sides of the same concept. However, that they did not find a solid object there the size of the event horizon doesn't mean there are black holes causing the behavior of visible stars at the center of galaxies. It could be that the gravitational theory is incorrect at that scale.

  10. #1000
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    Quote Originally Posted by Dreamwoven View Post
    I think most planets are stormy, and many moons are, too.
    You must have a different version of Space to the one I get. A lot more info on the moons of Saturn and other large planets. Very interesting, especially the possibility of a special probe to investigate.

  11. #1001
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    Astronomy

    http://earthsky.org/space/how-hard-did-it-rain-on-mars? Applying knowledge of rain on earth to Mars long ago.

  12. #1002
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    Quote Originally Posted by Dreamwoven View Post
    This is the clearest explanation I have found of the Big Bang Theory:

    https://www.universetoday.com/135791...iest-universe/
    This one contained a shock! I had always thought the diameter of the universe grew to at least several hundred thousand light years during Cosmic Inflation.

    One must adjust. It is hard to wrap one's ears around the scale visually. Yes, the diameter of the universe did increase by a hundred septillion times during inflation. However, starting out smaller than an atom, this only brought its diameter up to almost a thousandth of a meter. The mind must have a sense of how small atoms really are to make this increase seem stunning. The fact that the increase seems to have occurred in about an octillionth of a second (or somewhere in that neighborhood) can add to the effect of just how dramatic it was--to increase your size by a factor of a hundred septillion--but in an octillionth of a second. Now that's moving!
    Last edited by desiresjab; 06-07-2017 at 04:43 AM.

  13. #1003
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    Astronomy


  14. #1004
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    Quote Originally Posted by Dreamwoven View Post
    Yeah, it is mind boggling. To feel secure, one would have to understand why curvature would produce distortions in the heat signature. I am not pysicist enough to say. I get the geometrical idea--I can see how the surface you are traveling affects how many 90 degree turns are required to arrive back at your starting place. That is the first time I have seen a good explanation of what astronomers are implying when they say the universe is "flat."

  15. #1005
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    Astronomy

    Yes, desiresjab, thats where I get to, too, four 90 degree turns take you back to where you started...

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