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'Planet Y' theory hints at hidden Earth-size world lurking in the solar system — and it could be much closer to us than 'Planet Nine' (www.livescience.com)
submitted 1 year ago by to c/science@lemmy.world
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[–] 5 points 1 year ago (4 children)

I love the ever permanent comet in that image. I like to think it somehow has a tail, yet sits in orbit

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  • [–] 6 points 1 year ago (3 children)

    All planets have elliptical orbits just like periodic comets. Comets' elliptic is just more extreme.

    Mercury, Mars and Venus have tails, they just aren't as visible.

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  • [–] 3 points 1 year ago (2 children)

    While I understand they are all elliptical, isn't that the reason they moved Pluto to a dwarf planet, because it's orbit was "to elliptical" and crossing Neptune's orbital path?

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  • [–] 4 points 1 year ago

    Its orbit is also at a considerable angle relative to the plane all other planets orbit in. That alone made me question it's planet-ness long before it got demoted. And I felt really validated when Jim Carrey's kids in Me, Myself and Irene argued about Pluto being a planet or not.

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