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  3. Earth will spin faster on July 22 to create 2nd-shortest day in history

Earth will spin faster on July 22 to create 2nd-shortest day in history

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  • W [email protected]

    What was your mother's maiden name again?

    A This user is from outside of this forum
    A This user is from outside of this forum
    [email protected]
    wrote on last edited by
    #7

    Just curious... favourite pet?

    K T 2 Replies Last reply
    5
    • A [email protected]

      Just curious... favourite pet?

      K This user is from outside of this forum
      K This user is from outside of this forum
      [email protected]
      wrote on last edited by
      #8

      I'm so glad we are both from that one town. How do you spell it again? I always get it wrong.

      adespoton@lemmy.caA 1 Reply Last reply
      5
      • K [email protected]

        I'm so glad we are both from that one town. How do you spell it again? I always get it wrong.

        adespoton@lemmy.caA This user is from outside of this forum
        adespoton@lemmy.caA This user is from outside of this forum
        [email protected]
        wrote on last edited by
        #9

        Did we go to the same high school?

        T 1 Reply Last reply
        4
        • return2ozma@lemmy.worldR [email protected]
          This post did not contain any content.
          adespoton@lemmy.caA This user is from outside of this forum
          adespoton@lemmy.caA This user is from outside of this forum
          [email protected]
          wrote on last edited by
          #10

          According to a 2023 study, a day on Earth was approximately 19 hours for a significant part of Earth's early history

          That headline plays fast and loose with “history” — history supposedly started in 1973?

          potoo22@programming.devP A 0 Z 4 Replies Last reply
          9
          • return2ozma@lemmy.worldR [email protected]
            This post did not contain any content.
            P This user is from outside of this forum
            P This user is from outside of this forum
            [email protected]
            wrote on last edited by
            #11

            Pedantry time!

            When they talk about this stuff they really need to specify which "day" they're talking about, or else for places that do so, the day the clocks go forward is the shortest day in a year with no others being close.

            From another viewpoint, all rotations relative to the non-Sun stars - aka sidereal days - are still shorter. The daily movement along our orbit around the Sun contributes an extra four minutes to make up the full 24 hours.

            And so, they must be talking about the solar day. They do say 24 hours after all. Or must they? The discrepancy in the nearest sidereal day will be almost exactly the same, and that rounds to 24. So for which day was the lacking one-and-a-bit milliseconds calculated for?

            M 1 Reply Last reply
            1
            • return2ozma@lemmy.worldR [email protected]
              This post did not contain any content.
              X This user is from outside of this forum
              X This user is from outside of this forum
              [email protected]
              wrote on last edited by
              #12

              There's some strangely backwards science in there for a website with such a prominent domain, I wonder if it was AI generated.

              1 Reply Last reply
              0
              • adespoton@lemmy.caA [email protected]

                According to a 2023 study, a day on Earth was approximately 19 hours for a significant part of Earth's early history

                That headline plays fast and loose with “history” — history supposedly started in 1973?

                potoo22@programming.devP This user is from outside of this forum
                potoo22@programming.devP This user is from outside of this forum
                [email protected]
                wrote on last edited by
                #13

                Even in the article:

                According to a 2023 study, a day on Earth was approximately 19 hours for a significant part of Earth's early history...

                1 Reply Last reply
                3
                • W [email protected]

                  What was your mother's maiden name again?

                  wreckedcarzz@lemmy.worldW This user is from outside of this forum
                  wreckedcarzz@lemmy.worldW This user is from outside of this forum
                  [email protected]
                  wrote on last edited by
                  #14

                  I used to think that those recovery questions are stupid, but no. The user is the stupid one, entering the expected information. A few years ago I just decided to enter another generated password in each of the recovery questions, and store them alongside the main one in my password manager. Yes, the school I attended in the fourth grade was nVKuq&zo5BiCOc*0JY5JZHsgRPqcJEumBKV5tt%uSk#acN60s!uLh5MIGwobA3YyHIq3dQxm8r0Yhloloc&3a3BLm!nNbAZ%Vzut - it's worked for every site I've tried it on, too.

                  Uno reverse the hackers, 4 passwords instead of 1. 😎

                  J 1 Reply Last reply
                  3
                  • P [email protected]

                    Pedantry time!

                    When they talk about this stuff they really need to specify which "day" they're talking about, or else for places that do so, the day the clocks go forward is the shortest day in a year with no others being close.

                    From another viewpoint, all rotations relative to the non-Sun stars - aka sidereal days - are still shorter. The daily movement along our orbit around the Sun contributes an extra four minutes to make up the full 24 hours.

                    And so, they must be talking about the solar day. They do say 24 hours after all. Or must they? The discrepancy in the nearest sidereal day will be almost exactly the same, and that rounds to 24. So for which day was the lacking one-and-a-bit milliseconds calculated for?

                    M This user is from outside of this forum
                    M This user is from outside of this forum
                    [email protected]
                    wrote on last edited by
                    #15

                    There's another factor - days where thr earth is orbiting faster, eg on the closer side of the ellipse - are a different length midday to midday from when we are on the far side of the ellipse.

                    You can convince yourself of this when you consider that the area of the arc we traverse each day is the same (Kepler's law). On the short side of our eliptical orbit, since the orbital distance is shorter, the arc must have a larger angle that we travel. That means the amount a point on the earth rotates to have the sun come back directly overhead must be different in different parts of the year.

                    This difference, summed day over day, results in a +/- 20 min movement of actual midday to 12pm. The 'mean' in Greenwich Mean Time refers to averaging this difference over the whole orbit.

                    1 Reply Last reply
                    1
                    • adespoton@lemmy.caA [email protected]

                      Did we go to the same high school?

                      T This user is from outside of this forum
                      T This user is from outside of this forum
                      [email protected]
                      wrote on last edited by
                      #16

                      Man, I almost ran into the piece of shit car you had so many times… what even WAS that thing?!

                      adespoton@lemmy.caA 1 Reply Last reply
                      2
                      • adespoton@lemmy.caA [email protected]

                        According to a 2023 study, a day on Earth was approximately 19 hours for a significant part of Earth's early history

                        That headline plays fast and loose with “history” — history supposedly started in 1973?

                        A This user is from outside of this forum
                        A This user is from outside of this forum
                        [email protected]
                        wrote on last edited by
                        #17

                        Time didn't exist before January 1, 1970.

                        C D 2 Replies Last reply
                        16
                        • return2ozma@lemmy.worldR [email protected]
                          This post did not contain any content.
                          N This user is from outside of this forum
                          N This user is from outside of this forum
                          [email protected]
                          wrote on last edited by
                          #18

                          Uriel having a bad day?

                          1 Reply Last reply
                          0
                          • adespoton@lemmy.caA [email protected]

                            According to a 2023 study, a day on Earth was approximately 19 hours for a significant part of Earth's early history

                            That headline plays fast and loose with “history” — history supposedly started in 1973?

                            0 This user is from outside of this forum
                            0 This user is from outside of this forum
                            [email protected]
                            wrote on last edited by
                            #19

                            Yeah, I seem to recall Dinosaurs having 22/23 hour long days. It's been a while, my memory is a bit foggy 😉

                            T 1 Reply Last reply
                            1
                            • return2ozma@lemmy.worldR [email protected]
                              This post did not contain any content.
                              P This user is from outside of this forum
                              P This user is from outside of this forum
                              [email protected]
                              wrote on last edited by
                              #20

                              Even shorter than Sunday?

                              1 Reply Last reply
                              8
                              • R [email protected]

                                Stop lying, we all know there's nobody younger than 35 on Lemmy.

                                troyunrau@lemmy.caT This user is from outside of this forum
                                troyunrau@lemmy.caT This user is from outside of this forum
                                [email protected]
                                wrote on last edited by
                                #21

                                I'm in this comment and I don't know why

                                1 Reply Last reply
                                1
                                • A [email protected]

                                  Time didn't exist before January 1, 1970.

                                  C This user is from outside of this forum
                                  C This user is from outside of this forum
                                  [email protected]
                                  wrote on last edited by
                                  #22

                                  It's true. Just ask a computer.

                                  1 Reply Last reply
                                  1
                                  • T [email protected]

                                    Man, I almost ran into the piece of shit car you had so many times… what even WAS that thing?!

                                    adespoton@lemmy.caA This user is from outside of this forum
                                    adespoton@lemmy.caA This user is from outside of this forum
                                    [email protected]
                                    wrote on last edited by
                                    #23

                                    I named it after your first pet, Spike. It was Spike, wasn’t it?

                                    1 Reply Last reply
                                    1
                                    • A [email protected]

                                      Time didn't exist before January 1, 1970.

                                      D This user is from outside of this forum
                                      D This user is from outside of this forum
                                      [email protected]
                                      wrote on last edited by
                                      #24

                                      And won’t exist after January 19, 2038, 03:14:07 UTC.

                                      1 Reply Last reply
                                      1
                                      • wreckedcarzz@lemmy.worldW [email protected]

                                        I used to think that those recovery questions are stupid, but no. The user is the stupid one, entering the expected information. A few years ago I just decided to enter another generated password in each of the recovery questions, and store them alongside the main one in my password manager. Yes, the school I attended in the fourth grade was nVKuq&zo5BiCOc*0JY5JZHsgRPqcJEumBKV5tt%uSk#acN60s!uLh5MIGwobA3YyHIq3dQxm8r0Yhloloc&3a3BLm!nNbAZ%Vzut - it's worked for every site I've tried it on, too.

                                        Uno reverse the hackers, 4 passwords instead of 1. 😎

                                        J This user is from outside of this forum
                                        J This user is from outside of this forum
                                        [email protected]
                                        wrote on last edited by
                                        #25

                                        Nice. My bank lets me pick my own questions, too. The answers are a transformation of the question which, itself, is just some ASCII. My wife uses the same login for the bank, and she hates it.

                                        Now, you got me thinking. I could make the questions cryptographic hashes that I decrypt to an answer. My wife is going to kill me.

                                        1 Reply Last reply
                                        2
                                        • W [email protected]

                                          What was your mother's maiden name again?

                                          30p87@feddit.org3 This user is from outside of this forum
                                          30p87@feddit.org3 This user is from outside of this forum
                                          [email protected]
                                          wrote on last edited by [email protected]
                                          #26

                                          According to my password manager... _^J©7O]M¢#yi¼LTKWtId@fBl±bM}).÷*N§p*@+J(K/?³_:nz¼4Xo_ODR@¿-G>#9YSé_÷L/wp±i9mN<!8S)§Lw2p$'e(w^+y^g.}ïù_;InN¹§Z^ME1I}3&!tNd®UEa:ïvQ¡¼v4½¿ï%÷32 Q°]%`0,¿>6*×F/ñbo0{/IN:Y]F§OZy?N0¼½- 9yù=T{.LD0®¼C0M×H>])½PV+Ybw×!?Uj>5-b{`#g!E,WQ}&p°c2"U}'j½WqQf#¹Té#¡GMq-_×XAB=¦

                                          V T 2 Replies Last reply
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