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Joined 2 years ago
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Cake day: July 12th, 2023

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  • There is no clear definition of what constitutes a moon other than it being a body that orbits another body that orbits the parent star.

    There are some astronomers who say the dividing line between a moon-planet/dwarf planet/asteroid system and binary (or more) planet/dwarf planet/asteroid system is whether or not the barycenter of the orbits is within one of the bodies or not.

    And fun fact: if that definition gained acceptance, it would mean that the Pluto-Charon system would go from a dwarf planet-moon system to a binary dwarf planet system. Charon could get a promotion.





  • CrazyLikeGollum@lemmy.worldtomemes@lemmy.worldArrogant Cowboys
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    12 days ago

    Alaska is also on the ring of fire and the Aleutians are also a volcanic island chain.

    Both Alaska and Hawaii have on average 1-2 volcanic eruptions per year. However, Alaska has an average of about 12,000 earthquakes per year. Hawaii has an average of about 100 earthquakes per year.

    Alaska is by far more geologically unstable than Hawaii.