• Home
    • Recent
    • Calendar
    • Register
    • Login
    Iron Heart Forum
    Iron Heart Forum

    Iron Heart Fall/Winter 2025 Live Reveal - Thursday 12th of June at 1700BST

    This Blew My Mind!

    General Chat
    26
    109
    7.2k
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • weftyarnW
      weftyarn
      Iron Heart Deity
      Joined:

      Many years into professional 3d printing this still boggles my mind

      IMG_1992.jpeg

      Use it or lose it.

      last edited by MizmazzleM 1 Reply Last reply Reply Quote 4
      • seawolfS
        seawolf
        Mod Squad
        Joined:

        Love this thread!

        “Good design is actually a lot harder to notice than poor design, in part because good designs fit our needs so well that the design is invisible” - Don Norman

        @zeebeeleather

        last edited by 1 Reply Last reply Reply Quote 0
        • mclaincauseyM
          mclaincausey
          見習いボス
          Joined:

          Did you know that the Milky Way galaxy, one of 2 trillion galaxies that we know of (and my intuition is that it is one of an infinite number of galaxies), is so vast that if it were the size of the continental US, our solar system would be the size of a quarter, and Earth the size of a grain of sand?

          Mind-boggling—check out this incredible video on the topic.

          Think it, be it.

          last edited by I 1 Reply Last reply Reply Quote 4
          • MizmazzleM
            Mizmazzle
            見習いボス
            Joined:

            My mind is definitely blown!

            I always love to inform my students of the factoid that there are as many stars in our galaxy as there are grains of sand on every beach across the entire planet!! And each one of those stars is a sun that has its own planets orbiting around it.

            In the easy chair with my boots on, melted whiskey in my hand. Could'na been asleep for more than three hours...time to go to work again...

            last edited by Mizmazzle seawolfS 1 Reply Last reply Reply Quote 1
            • MizmazzleM
              Mizmazzle
              見習いボス
              @weftyarn
              Joined:

              @weftyarn I showed this to my wife. She could barely wrap her mind around it. Me on the other hand, I have no idea what’s going on.

              In the easy chair with my boots on, melted whiskey in my hand. Could'na been asleep for more than three hours...time to go to work again...

              last edited by 1 Reply Last reply Reply Quote 0
              • I
                IrishHeart
                Haraki san Expert
                @mclaincausey
                Joined:

                @mclaincausey I need a lie down after watching that. Absolutely mind blowing. Thanks for sharing.

                last edited by 1 Reply Last reply Reply Quote 0
                • seawolfS
                  seawolf
                  Mod Squad
                  @Mizmazzle
                  Joined:

                  @Mizmazzle I know this fact, and it's one that I've repeated, yet our brains cannot comprehend that scale of anything, and it will never cease to absolutely amaze me. And the fact that the universe is also constantly expanding in every direction hurts my brain. And if it weren't expanding, and it just IS, is it just... infinite?!

                  “Good design is actually a lot harder to notice than poor design, in part because good designs fit our needs so well that the design is invisible” - Don Norman

                  @zeebeeleather

                  last edited by MizmazzleM 1 Reply Last reply Reply Quote 0
                  • MizmazzleM
                    Mizmazzle
                    見習いボス
                    @seawolf
                    Joined:

                    @seawolf thank god I had a couple sips of coffee before I read your post, otherwise my brain would have gone into full scale, level 5, meltdown.

                    And by definition of infinite, the universe MUST be expanding…otherwise we’d reach an end point and someone would finally win the “I called shotgun, no place backs, time infinity!” Rule.

                    In the easy chair with my boots on, melted whiskey in my hand. Could'na been asleep for more than three hours...time to go to work again...

                    last edited by seawolfS 1 Reply Last reply Reply Quote 1
                    • MattM
                      Matt
                      見習いボス
                      Joined:

                      And then there’s the multiverse

                      last edited by 1 Reply Last reply Reply Quote 0
                      • krebsyK
                        krebsy
                        Haraki san Student
                        Joined:

                        What blows my mind beyond the fact that it's expanding, is that the rate of expansion is accelerating, not decelerating or staying constant. Then you get into dark matter and dark energy...

                        Looks like denim truly is the fabric of our salvation.

                        last edited by 1 Reply Last reply Reply Quote 0
                        • mclaincauseyM
                          mclaincausey
                          見習いボス
                          Joined:

                          A couple more for you.

                          The scale I talked about for the size of the galaxy, which requires 120,000 years for a beam of light moving at the maximum physically possible speed through space, is inconsequentially small next to the size of the observable universe, which is 93 billion light years. Because the expansion of space isn’t limited by light speed, the relative speed of recession for far flung galaxies exceeds the speed of light.

                          Here’s the kicker: as vast as the universe is known to at least be, there are more orders of magnitude to the smallest possible scale (the Planck length) than there are to the largest observable scale (the observable universe). The observable universe : us is not as large of a difference as us : the smallest possible scale understood by physics.

                          There are four kinds of multiverses in the way that Max Tegmark breaks it down and I’ll summarize those when I have more time later.

                          Think it, be it.

                          last edited by mclaincausey SKTS 1 Reply Last reply Reply Quote 0
                          • MizmazzleM
                            Mizmazzle
                            見習いボス
                            Joined:

                            You guys are smart

                            In the easy chair with my boots on, melted whiskey in my hand. Could'na been asleep for more than three hours...time to go to work again...

                            last edited by 1 Reply Last reply Reply Quote 0
                            • flannel slutF
                              flannel slut
                              Raw and Unwashed
                              Joined:

                              Yep. I find this very interesting while comprehending very little at the same time.

                              last edited by 1 Reply Last reply Reply Quote 1
                              • SKTS
                                SKT
                                見習いボス
                                @mclaincausey
                                Joined:

                                @mclaincausey I love this stuff…preach brother!

                                last edited by 1 Reply Last reply Reply Quote 0
                                • mclaincauseyM
                                  mclaincausey
                                  見習いボス
                                  Joined:

                                  Here is Tegmark’s pop science article about multiverses: https://space.mit.edu/home/tegmark/PDF/multiverse_sciam.pdf

                                  Level 1: this is saying that the universe is likely to be large enough for a given configuration of particles in space to be infinitely replicated. So there would be an infinite number of copies of us, for example, across an unimaginably large swath of space and time. Anything that the laws of physics allows happens somewhere. Any possible configuration of particles within a given space happens somewhere. These would not be observable since they would be so far away and receding from us at over the speed of light—no signal could reach us. It is beyond our “cosmic horizon.“ while I think this is probable, it’s not testable and thus more philosophy than science, which is true of a lot of this. But there is reason to suspect it’s true.

                                  Level 2: the predominant theory for the formation of our universe is called cosmic inflation. This theory predicts that we are in one of a possibly infinite number of “bubbles” that form after a period of inconceivably rapid expansion of the universe. Each bubble would have its own physical constants and laws of physics. If there is an infinite number of them, eventually one identical to ours would be out there.

                                  Level 3: the most parsimonious explanation for the “weirdness” of quantum theory where a particle doesn’t have a position until it is observed is something called the universal wave function or the many worlds interpretation of quantum mechanics, versus the Copenhagen interpretation which says the act of observation somehow collapses a waveform of probably locations into a single discrete location. This interpretation basically says that all locations are valid, and that the universe splits in along every valid location.

                                  Level 4 gets into simulation theory and that we’re living effectively in a vast computer.

                                  I think 1, 2, and 3 are probably true.

                                  Think it, be it.

                                  last edited by 1 Reply Last reply Reply Quote 0
                                  • SKTS
                                    SKT
                                    見習いボス
                                    Joined:

                                    This is why we need the Time Variance Authority. 🤯

                                    last edited by 1 Reply Last reply Reply Quote 3
                                    • NocturamaN
                                      Nocturama
                                      Haraki san Prodigy
                                      Joined:

                                      Me, pretending to understand this thread, whilst wishing I hadn’t rewatched The Matrix yesterday…

                                      IMG_0234.jpeg

                                      #JustStopCrocs

                                      last edited by 1 Reply Last reply Reply Quote 0
                                      • I
                                        IrishHeart
                                        Haraki san Expert
                                        Joined:

                                        I only popped on here to look at the jeans.

                                        last edited by 1 Reply Last reply Reply Quote 9
                                        • seawolfS
                                          seawolf
                                          Mod Squad
                                          @Mizmazzle
                                          Joined:

                                          @Mizmazzle This honestly made me nauseated for a second as my brain tried to comprehend.

                                          “Good design is actually a lot harder to notice than poor design, in part because good designs fit our needs so well that the design is invisible” - Don Norman

                                          @zeebeeleather

                                          last edited by 1 Reply Last reply Reply Quote 0
                                          • seawolfS
                                            seawolf
                                            Mod Squad
                                            Joined:

                                            That's enough internet for today, friends! 🤣

                                            “Good design is actually a lot harder to notice than poor design, in part because good designs fit our needs so well that the design is invisible” - Don Norman

                                            @zeebeeleather

                                            last edited by 1 Reply Last reply Reply Quote 1
                                            • First post
                                              Last post
                                            Copyright Iron Heart 2022.