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Two Stars Slammed Into Each Other And Solved Half Of Astronomy’s Problems. What Comes Next?

Discussion in 'Science and Technology' started by Sunstone, Nov 14, 2017 at 8:13 PM.

  1. Sunstone

    Sunstone De Diablo Del Fora
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  2. Enoch07

    Enoch07 Theistic Rationalist and Libertarian
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  3. Brickjectivity

    Brickjectivity simple man
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    Wow Wow Wow thanks for posting that.
     
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  4. idav

    idav Being
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    What's next is solving more mysteries.


     
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  5. icehorse

    icehorse Well-Known Member
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  6. sayak83

    sayak83 Well-Known Member

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    Now lots of students get to write their astronomy and astrophysics PHDs in record time as their profs dream of Nobel Prizes and grants and conferences in exotic locations.

    And the YEC brigade gets busy trying to explain how all this is either a conspiracy or can be explained in a 6000 year old universe.

    :p
     
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  7. Brickjectivity

    Brickjectivity simple man
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    There are only 2 gravitation wave detectors yet it is possible to partially triangulate the direction in space? They must be relying upon the movement of Earth through space. Otherwise how could they do it? The intersection of two receivers creates a circle in 3D space -- not a point. What they can tell from the 2 interfere-ometers should be that a wave is detected at time X by one detector and then at a slightly different time at the other interfere-ometer. This is good enough for radar on a 2D map like the Earth's surface, but its not enough in 3D space. So...how did they know what direction to point all of the glass? Best guess...they had to search in a ring; but they would have known at what distance. They had some time between the arrival of the gravitational waves and the various other energetic wavefronts, so that explains how they had time to search. 6 telescopes confirmed by sight what they interfere-ometers detected. There were probably many more telescopes searching in a ring in space.
     
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  8. BSM1

    BSM1 Who's a good boy?

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  9. Kapalika

    Kapalika Musician and Mystic
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    Praise the Universe! Pretty awesome stuff. I know they had talked for years about a collision like this and trying to observe one.Years ago astronomers had observed what they had good evidence to be a blackhole and neutron star collision, but this itself is something very different. Blackholes by their very nature tend to obscure things. Two neutron stars not so much, as this shows.

    I remember when I was a teen a common idea about the short gamma ray bursts was tied to hypothetical hyper novas, the idea of nuetron-blackhole or nuetron-nuetron star collisions didn't have as much traction. Good to see it finally solved. Only thing I'd point out about the article is it didn't distinguish between short and long gamma ray bursts but obviously it was going for the larger picture, hence it's mentioning of that in passing.

    So much progress has been made in Astronomy in the last 20 years it's insane. We know things people didn't imagine figuring out in their lifetime. It's funny to read a book from the 80's or 90's dismissing "planet X" but then fast forward to after 2000 and we know about dozens of dwarf planets almost the size of Pluto floating around there (Sedna, Eris, ect).
     
    #9 Kapalika, Nov 15, 2017 at 2:31 AM
    Last edited: Nov 15, 2017 at 2:37 AM
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  10. SalixIncendium

    SalixIncendium Resident Hermit
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    I rolled over in the middle of the night and saw this thread in the 'New Threads' section on the forum list on my tablet, which came up "Two Stars Slammed Into Each..."

    In my bleary-eyed state, I read, "Two Stars Slammed Into Earth..." and my first waking though was, "...and I slept through it?"
     
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  11. Altfish

    Altfish Well-Known Member

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  12. Polymath257

    Polymath257 Well-Known Member
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    There are two LIGO detectors and one Virgo detector, so that gives three detectors, leading to much better direction information. This was a problem before the Virgo detector came online: we could know we had a gravitational wave, but not where it would be in the sky (as you said, it was narrowed down to a circle) We also saw a gamma ray burst at the same time with other detectors. So that gave a coincidence between the gravity waves and the gamma ray bursts. The gamma ray detectors have an early-warning system so that multiple telescopes can be directed to them when they happen. In this case, we also saw the gravitational waves at the same time.

    The distance isn't as much of an issue: we point in the correct direction in the sky and if we collect enough photons and have enough resolution, we get an image.
     
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  13. WalterTrull

    WalterTrull Active Member

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    Tom Cruise and Andrew Keegan? Whoda thought.
     
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  14. BSM1

    BSM1 Who's a good boy?

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    What are the odds? Right?
     
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