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[–] 50 points 1 month ago (14 children)

Either we now have to learn like 21 planets in elementary school (hard) or Pluto gets a technical demotion (easy).

Pluto is still a planet in all our hearts, this is just humanities constant march of trying to become more and more accurate and precise with time

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  • [–] 14 points 1 month ago (9 children)

    Teaching the dwarf planets could be fun, though. What about thebfact that Pluto and Charon orbit one another, and how you could build a space elevator directly from.the surface of one to.the other?

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  • [–] 3 points 1 month ago (8 children)

    wait what? how would that be possible

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  • [–] 5 points 1 month ago* (5 children)

    Space is really huge and it might be possible that the theoretical space elevator would never strike another celestial body.

    This is 100% speculative and I have absolutely not done any fact checking other than the fact that space is indeed, really Big McLargeHuge.

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  • [–] 6 points 1 month ago (2 children)

    searches

    https://en.wikipedia.org/wiki/Tidal_locking

    However, if both the difference in mass between the two bodies and the distance between them are relatively small, each may be tidally locked to the other; this is the case for Pluto and Charon

    They're apparently tidally-locked, so that's one issue out of the way.

    https://en.wikipedia.org/wiki/Charon_(moon)

    Periapsis: 19 592.61 km

    Apoapsis: 19 598.92 km

    Eccentricity: 0.000161[10]

    So it's pretty close to a circular orbit.

    Orbital period: (6 d, 9 h, 17 m)

    But it'd still have to change length by about 6 km every 3 Earth days.

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  • [–] 4 points 1 month ago

    But it’d still have to change length by about 6 km every 3 Earth days.

    Maybe this is crazy, but make it a giant jumprope. When they're closer together, the jumprope makes a tighter circle and spins faster. When they're further apart, the jumprope makes a larger circle. Put a weight in the middle so it has enough centripetal force to keep the rope taut.

    Trust me, it works, I thought about it for two minutes.

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  • [–] 2 points 1 month ago*

    If humanity ever were to have the means to build a 12.2k mile or 19.7k km elevator in space between two planets at the far reach of the solar system, I would assume that we would also be capable of somehow making it longer

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  • [–] 2 points 1 month ago

    Pluto and Charon are mutually tidally locked, so they don't rotate in relation to each other.

    Plus, in smaller bodies you don't need impossibly strong materials to make a space elevator like you'd need for Earth. Hell, Kevlar fiber is strong enough to make a space elevator from the Moon to one of the Lunar Lagrange points due to the reduced gravity

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  • [–] 12 points 1 month ago (3 children)

    Pluto is still a planet in all our hearts

    My heart pumps blood. My brain does the thinking. Pluto is not a planet. So what? It's still fascinating.

    Pluto and Charon are tidally locked, meaning they always face each other as they orbit around. Romanticizing a bit, they are like dancers.

    https://www.youtube.com/watch?v=bU5pQWQRxak

    I'm your moon, you're my moon,

    We go round and round.

    From out here, it's the rest of the world that looks so small.

    Promise me you will always remember who you are.

    Labels can be helpful for categorizing, organizing our knowledge. Labels do not define us. We're all space stuff.

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  • [–] 29 points 1 month ago (2 children)

    More recently, the campaign has taken on a populist tinge, with Trump’s Nasa administrator, Jared Isaacman, telling a congressional committee in April that he was in favour of a rethink. “I am very much in the camp of Make Pluto a Planet Again,” he said.

    I think this says all that needs to be said about it.

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    [–] 25 points 1 month ago (11 children)

    if you wanna call Pluto a a planet, do it. The IAU is not going to arrest you or something.

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  • [–] 12 points 1 month ago (3 children)

    Don't believe this person, I said it was a planet and spent 5years locked away in the planetarium

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  • [–] 20 points 1 month ago (5 children)

    no. I really wish non scientists would stay out of details like what is actual medicine or classification of astronimical objects.

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  • [–] 12 points 1 month ago (2 children)

    I'm no scientist, but it's a pretty obvious no if you understand the reason it's no longer considered a planet.

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    [–] 20 points 1 month ago (2 children)

    The argument that Pluto would be a planet if it were in a different orbital track is pretty disingenuous, because in a different orbital track it might also be a moon of Jupiter or just flung out into interstellar space.

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  • [–] 3 points 1 month ago

    I think the argument was more of proposing that the definition of its own orbital track is not informative of anything of the body itself but instead only of what is surrounding the object. The argument seems to be an extension of the planetary scientist school of thought (definition of planet should describe planet) vs the astronomical side (name describes motion/in relation to its surroundings)

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    [–] 11 points 1 month ago
    [–] 9 points 1 month ago (2 children)

    This kind of thing just fuels the anti-science conservative agenda. Knock it off.

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    [–] 9 points 1 month ago (17 children)

    Oh, plutodrama is still going on. What is the current definition of planet?

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  • [–] 20 points 1 month ago* (16 children)

    Orbits the sun, has enough gravity to form a sphere and has cleared it's orbit. It's the clearing the orbit part where Pluto fails, as do Ceres, Haumea, Makemake, and Eris. And also Quaoar, Orcus, Ixion, Varuna, Sedna, Gonggong, Salacia, Varda, Hygiea and Vesta. They all orbit in basically an asteroid field.

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  • [–] 2 points 1 month ago (6 children)

    Do the Trojan asteroid clusters in Jupiter’s L4 and L5 points still count as “clearing its orbit”?

    What if there were a second planet-sized body there?

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  • [–] 3 points 1 month ago*

    Do the Trojan asteroid clusters in Jupiter’s L4 and L5 points still count as “clearing its orbit”?

    What if there were a second planet-sized body there?

    I would say in that example:

    • Jupiter is the dominant mass making it be the planet.
    • Anything in the Lagrangian points would not be planets specifically because anything in those points are there because of Jupiter and its orbit, not in spite of it.
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  • [–] 9 points 1 month ago (1 child)

    Pluto in a tiny squeaky voice: "yes"

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  • [–] 8 points 1 month ago

    Pluto is only 68% of the size of the Earth's moon. It is only about 2.5 times larger than Ceres, the largest asteroid in our solar system.

    A large part of science is refining your understanding as contradictory evidence is found. I used to think Pluto should be a planet, and even met Clyde Tombaugh once, but I have absolutely no concerns about Pluto being reclassified as a dwarf planet. It is just a label and our understanding evolves.

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  • [–] 7 points 1 month ago

    Trump is literally just doing sitcom bits now

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  • [–] 5 points 1 month ago
    [–] 4 points 1 month ago (1 child)
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    [–] 4 points 1 month ago

    More recently, the campaign has taken on a populist tinge, with Trump’s Nasa administrator, Jared Isaacman, telling a congressional committee in April that he was in favour of a rethink. “I am very much in the camp of Make Pluto a Planet Again,” he said.

    nobody cares about your opinion

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  • [–] 3 points 1 month ago
    [–] 2 points 1 month ago

    Pretty sure there's an Aesop Rock song about this...

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