• 0x4E4F
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    1 year ago

    Have no idea how this works… there is no gravitational pull at the L2 point, it’s just an empty point in space 🤨.

    • Stumblinbear@pawb.social
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      1 year ago

      JWST isn’t going in circles, it’s orbiting the sun. If you look at it relative to that, then it looks more like a sine wave rather than going in circles. However from the perspective of the earth, it looks like it’s going in circles

      • 0x4E4F
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        1 year ago

        Maybe gravitational push-pull between planets and moons… IDK, it might be some sweet spot they discovered where gravitational forces do weird things, lol 😂.

        • Balex@lemmy.world
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          1 year ago

          This. There’s 5 Legrange Points for every 2 body system. They’re specific points around the 2 bodys where the gravity “cancels out”. In this case the 2 body system is the Earth and the Sun. JWST is sitting a million miles from Earth at L2.

          • MrBobDobalina@lemmy.ml
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            1 year ago

            Dammit, I was feeling proud that my first thought on how this could work lined up with the explanation… But I had assumed L2 (didn’t stop to think about the label) was where I now see L1 to be. I can wrap my head around L1 just fine, but how the heck is L2 the same? Or the others for that matter? Gonna stare at this for a while…

            • Balex@lemmy.world
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              1 year ago

              If you understand gravity wells, think of L1/L2/L3 as the shape of a saddle. If you’re right in the middle of the saddle it’s a pretty stable orbit, but if you get too close to any of the edges you fall right out of it. L4 and L5 are like the peaks of a mountain.

              Also worth pointing out that only L4 and L5 are stable, L1/L2/L3 are only metastable where they require a bit of maintenance to stay there.

              Another fun fact about Legrange Points: There’s a group of asteroids called the Trojan Asteroids. There’s technically two groups of these since they’re stuck in L4 and L5 in the Sun/Jupiter system.

              • 0x4E4F
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                1 year ago

                Ah, so that’s why we don’t put shit in L4 and 5 😂… things will bump in them once in a while 😂.

      • 0x4E4F
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        1 year ago

        Yes, my point exactly. There is no mass at the L2 point, so how can it spin around it.

        Others explained it though, it makes sense now 👍.

        PS: What are enbies 🤨?