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Thread: Astronomy

  1. #1186
    On the road, but not! Danik 2016's Avatar
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    =Dreamwoven;1343353]I've been struggling to understand the dark energy debate. Gravitational waves (https://en.wikipedia.org/wiki/Gravitational_wave) and Black holes (https://en.wikipedia.org/wiki/Black_hole) are clearly connected. Black holes form as a result. As I see it, this means that black holes function as a sort of rubbish bin that can dispose of matter (like stars at the end of their lives when they become red dwarf stars?).
    Interesting links, DW.

    I'm not at home at this level of debate (though we all probably feel the same way) but perhaps we will learn more as time goes on.
    Neither are the astronomers themselves it seems:

    "Dark energy is usually assumed to form roughly 70% of the present material content of the universe. However, this mysterious quantity is essentially a place-holder for unknown physics."

    https://astronomynow.com/2017/09/18/...energy-debate/
    "You can always find something better than death."
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  2. #1187
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    "LIGO AND VIRGO OBSERVATORIES DETECT BLACK HOLES COLLIDING

    'With this first joint detection by the Advanced LIGO and Virgo detectors, we have taken one step further into the gravitational-wave cosmos,' he said. 'Virgo brings a powerful new capability to detect and better locate gravitational-wave sources, one that will undoubtedly lead to exciting and unanticipated results in the future.'

    The study of gravitational waves is a testament to the growing capability of the world’s science teams and the science of interferometry. For decades, the existence of gravitational waves was merely a theory; and by the turn of the century, all attempts to detect them had yielded nothing. But in just the past eighteen months, multiple detections have been made, and dozens more are expected in the coming years.

    What’s more, thanks to the new global network and the improved instruments and methods, these events are sure to tell us volumes about our Universe and the physics that govern it."

    https://www.universetoday.com/137319...les-colliding/
    "You can always find something better than death."
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  3. #1188
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    Yes, indeed!

  4. #1189
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    Plans for the advance base camp for Mars: https://www.universetoday.com/137361...ase-camp-mars/

  5. #1190
    On the road, but not! Danik 2016's Avatar
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    I understand the hurry in getting astronauts landed on Mars, but I think they have to be very carefull about the atmospheric and subsistence conditions. If I were an astronaut I certainly wouldn´t be satisfied just with iced water. I would want at least a fast food facility.
    "You can always find something better than death."
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  6. #1191
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    I think the idea is to set up an advance camp on the moon, so all supplies would be there for further shipment to Mars. I can't imagine that they would have to live on iced water.

    This is a shot from the ISS of the moon and planets seen in the sky: http://earthsky.org/space/video-iss-...ising-sep-2017

  7. #1192
    On the road, but not! Danik 2016's Avatar
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    Lovely rising!

    And look who has won the Nobel prize in physics:
    Nobel prize in physics awarded for discovery of gravitational waves
    £825,000 prize awarded to Rainer Weiss, Barry Barish and Kip Thorne for their work on Ligo experiment which was able to detect ripples in the fabric of spacetime

    https://www.theguardian.com/science/...nal-waves-ligo
    "You can always find something better than death."
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  8. #1193
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    Yes, but they released the news to Nobel just before the meeting. There is a lot of tactics involved. Like choosing your team of people and if possible having Oxbridge academics on the team.

    But all that aside its nice to see astronomy winning the Nobel Prize...
    Last edited by Dreamwoven; 10-05-2017 at 03:43 AM.

  9. #1194
    On the road, but not! Danik 2016's Avatar
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    I quite agree that the choices for the Nobel prize are anything but neutral and unbiased.
    But, anyway, the inclusion of astronomers is significant.
    "You can always find something better than death."
    Jacob and Wilhelm Grimm, The Bremen Town Musicians

  10. #1195
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    Popular Astronomy Nov/Dec 2016, "Citizen Science" p. 15

    Alice Sheppard has been involved with citizen science for 9 years, first running the Galaxy Zoo discussions (https://www.galaxyzoo.org) now working at University College, London) Extreme Citizen Science Department.

    Jenny McCormick (Farm Cove Observatory) http://www.farmcoveobs.co.nz has a 14-inch telescope and uses it to carry out microlensing: https://en.wikipedia.org/wiki/Gravit...l_microlensing

    Sadly, living in a forested part of Sweden the amount of clear sky I can see from our house is very limited. I do have 7x50 mm binoculars but the best I can do is to observe the moon when it is in the east.

  11. #1196
    On the road, but not! Danik 2016's Avatar
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    It is still better, DW, than living in a metropolis full of sky scraper where you forget there is a sky with moon and stars (and a lot of asteroids) in it.
    "You can always find something better than death."
    Jacob and Wilhelm Grimm, The Bremen Town Musicians

  12. #1197
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    I would conclude that citizen science is making a major contribution to knowledge about space and the many worlds to be discovered in it. Perhaps this is just a phase of space exploration, but it is notable how much citizen science is being conducted out there. For further information see https://en.wikipedia.org/wiki/Planet_Hunters.

  13. #1198
    On the road, but not! Danik 2016's Avatar
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    Interesting link, DW.

    About planet nine again:
    "The super-Earth that came home for dinner
    Date:
    October 4, 2017
    Source:
    NASA/Jet Propulsion Laboratory
    Summary:
    It might be lingering bashfully on the icy outer edges of our solar system, hiding in the dark, but subtly pulling strings behind the scenes: stretching out the orbits of distant bodies, perhaps even tilting the entire solar system to one side. It is a possible "Planet Nine" -- a world perhaps 10 times the mass of Earth and 20 times farther from the sun than Neptune."

    https://www.sciencedaily.com/release...1004144511.htm
    "You can always find something better than death."
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  14. #1199
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    Planet 9 is an interesting discovery. Look forward to its confirmation.

  15. #1200
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    Space Junk: (a case of citizen science), Alice Sheppard published a piece in Popular Astronomy (Jan-Feb 2017 p.17).

    See also: https://www.nasa.gov/mission_pages/s...al_debris.html
    and
    https://en.wikipedia.org/wiki/Space_debris

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