Rosshique Farmer

@RGStrauss69

Future Neurosurgeon

Vrijeme pridruživanja: travanj 2014.
5 fotografija ili videozapisa Fotografije i videozapisi

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  1. proslijedio/la je Tweet
    2. velj

    230 million years it takes the solar system to orbit the Milky Way center, and nearby stars mostly co-orbit with our solar system so it's a slow and minor change That said, some stars are fast moving nearby – high "proper motion" stars Here's Barnard's star, 6 light years away

    7 replies 100 proslijeđenih tweetova 357 korisnika označava da im se sviđa
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  2. proslijedio/la je Tweet
    2. velj

    The first new animation of 2020 is coming within hours It will address the confusion between a 23hr 56m Sidereal Day and the 24hr Solar Day we all know and love

    10 replies 2 proslijeđena tweeta 98 korisnika označava da im se sviđa
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  3. proslijedio/la je Tweet
    2. velj

    What to do? Your compass is your discomfort. If you don’t want to meditate, that’s when you need it most. If you’re afraid of a cold plunge, or a sweat lodge, that’s the medicine you need. If you don’t want to say something to a lover or a friend, that’s what you need to say.

    10 replies 72 proslijeđena tweeta 350 korisnika označava da im se sviđa
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  4. proslijedio/la je Tweet
    25. sij

    Fall in love with some activity, and do it! Nobody ever figures out what life is all about, and it doesn't matter. Explore the world. Nearly everything is really interesting if you go into it deeply enough!

    1.206 proslijeđenih tweetova 4.095 korisnika označava da im se sviđa
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  5. proslijedio/la je Tweet
    24. sij

    But the entropy of interstellar and intergalactic gas and dust is about 10 times more the entropy of stars! It's about 10^82 bits. And the entropy in all the photons in the Universe is much more! The Universe is full of radiation left over from the Big Bang. (6/n)

    1 reply 5 proslijeđenih tweetova 37 korisnika označava da im se sviđa
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  6. proslijedio/la je Tweet
    24. sij

    In 2009, Chas Egan and Charles Lineweaver estimated the total entropy of all the stars in the observable Universe at 10^81 bits. You should think of these as qubits: it's the amount of information to describe the quantum state of *everything* in all these stars. (5/n)

    3 proslijeđena tweeta 42 korisnika označavaju da im se sviđa
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  7. proslijedio/la je Tweet
    24. sij

    What's the total number of stars in the observable Universe? Estimates go up as telescopes improve. We think there are between 100 and 400 billion stars in the Milky Way. We think there are between 170 billion and 2 trillion galaxies in the Universe. (4/n)

    10 proslijeđenih tweetova 51 korisnik označava da mu se sviđa
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  8. proslijedio/la je Tweet
    24. sij

    But as the Universe expands, the distant ancient stars and gas we see have moved even farther away, so they're no longer observable. The so-called "observable Universe" is really the "formerly observable Universe". Its edge is 46.5 billion light years away now! (3/n)

    4 proslijeđena tweeta 52 korisnika označavaju da im se sviđa
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  9. proslijedio/la je Tweet
    24. sij

    What's the observable Universe? The further you look out into the Universe, the further you look back in time! You can't see through the hot gas from 380,000 years after the Big Bang. That "wall of fire" marks the limits of the observable Universe. (2/n)

    1 reply 5 proslijeđenih tweetova 65 korisnika označava da im se sviđa
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  10. proslijedio/la je Tweet
    24. sij

    This zoomable image of the Milky Way shows 84 million stars: But stars contribute only a tiny fraction of the total entropy in the observable Universe. If it's random information you want, look elsewhere! (1/n)

    10 replies 89 proslijeđenih tweetova 287 korisnika označava da im se sviđa
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  11. proslijedio/la je Tweet
    19. sij

    Footage of me right after my mastectomy: “I feel so proud of myself. It’s done. I did it!!!”

    5 replies 3 proslijeđena tweeta 179 korisnika označava da im se sviđa
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  12. proslijedio/la je Tweet
    20. sij

    Here's a consequence of Special Relativity to brighten your Monday— Due to its 220km/sec orbital motion around the milky way, the solar system is now over 1200 years younger than the center of our galaxy. This is time dilation, it *really* happens, it's not science fiction!🕐

    47 replies 458 proslijeđenih tweetova 1.957 korisnika označava da im se sviđa
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  13. proslijedio/la je Tweet
    19. sij

    In practice, it's a lot easier to *measure* the entropy of water than to compute it - though still tricky. Starting from there, here's how we compute the information per molecule. Physicists use "nats" of information, but we can convert nats to bits. (5/n)

    5 replies 13 proslijeđenih tweetova 107 korisnika označava da im se sviđa
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  14. proslijedio/la je Tweet
    19. sij

    You might also worry it would take an infinite amount of information to *exactly* describe the position and velocity of each molecule. This is actually true in classical mechanics! But this problem is solved by the uncertainty principle in quantum mechanics. (4/n)

    7 proslijeđenih tweetova 86 korisnika označava da im se sviđa
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  15. proslijedio/la je Tweet
    19. sij

    The Gibbs paradox was solved when we realized molecules of the same kind are perfectly interchangeable: it doesn't make sense to ask which one is where! When you take this into account, the entropy per molecule doesn't depend on the total amount of stuff. (3/n)

    5 replies 8 proslijeđenih tweetova 115 korisnika označava da im se sviđa
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  16. proslijedio/la je Tweet
    19. sij

    You might think it takes more information to describe a molecule in a swimming pool than in a jug of water, since there are more places it could be. This is called the "Gibbs paradox". If true, the entropy per molecule would depend on the total amount of stuff! (2/n)

    1 reply 9 proslijeđenih tweetova 89 korisnika označava da im se sviđa
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  17. proslijedio/la je Tweet
    19. sij

    Entropy is the amount of information you don't have about the random details of a system: what you'd need to describe those details. It takes 500 zettabytes to fully describe a gram of liquid water, but a manageable amount per molecule! (1/n)

    14 replies 207 proslijeđenih tweetova 854 korisnika označavaju da im se sviđa
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  18. proslijedio/la je Tweet
    19. sij

    He protecc He attacc But most importantly He smiles bacc

    3.286 proslijeđenih tweetova 17.829 korisnika označava da im se sviđa
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  19. proslijedio/la je Tweet
    19. sij

    When you're out in the park, by a lake, anywhere near/around nature... Do you ever just stop to REALLY look around? at the plants, the birds, the bugs, the sky, listen to the sounds, feel the wind, and think: "Damn, this planet is amazing" 🌍❤ That's a mood.

    27 replies 57 proslijeđenih tweetova 516 korisnika označava da im se sviđa
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  20. proslijedio/la je Tweet
    17. sij

    Me, as an undergrad, just starting upper level courses: THERE IS A PROFOUNDLY BEAUTIFUL REASON FOR ALL LAWS OF PHYSICS Me, as a perpetual graduate student: Light goes that fast because it wants to

    209 replies 9.822 proslijeđena tweeta 104.640 korisnika označava da im se sviđa
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