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Cake day: June 4th, 2023

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  • The Sol-Jupiter system would have a bary center just 7% outside the surface of Sol. The effect of all the Gas Giants together can either center the syster in Sol’s core or move the barycenter 120% outside Sol.

    The really weird thing is that the part of stars outside the core is more like an atmosphere. If the star gets hotter, the parts outside the core can expand. This is happening slowly as Sol’s core fills up with Helium and becomes denser, which fuses Hydrogen faster. So despite weighing less, the Sol-Jupiter barycenter will be engulfed within Sol’s envelope. Once Sol stops fusing Hydrogen in it’s core, the core will shrink and heat up, fusing Hydrogen in a shell around the core, which will cause the envelope to grow and engulf Venus and possibly Earth directly, and definitely contain the full system’s barycenter. After that it will release a bunch of mass in a planetary nebula, which will cause it to shrink a lot, and the remaining planets will probably orbit much farther out, which would throw the barycenter waaaayyyyyy outside of the white dwarf left over.





  • There are lots of reasons to have binocular frontal vision. Redundancy, differing info for optic flow, sensitivity, reducing the frontal blind spot, compensating for retinal blind spots, higher frontal resulution, seeing around things, depth perception…

    Most of there are good for predators, but predation isn’t the only reason to have them.




  • I can see a little grain of truth in finding depressions and soft ground as the dowser shifts their body to stand level, which may indicate geological features associated with ground water.

    Humans also have a really good sense of smell for petrichor, which might also be related to ground water, with dowsing just being useful to focus on suble things like smell.

    Anyone who thinks dowsing can detect water directly is clueless or lying though, and dowsing has absolutely been used as a grift before.







  • Tlaloc_Temporal@lemmy.catoScience Memes@mander.xyzBanana
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    2 months ago

    Not all apples, but many. Including Macintosh, which was found along a road and could never produce viable seeds. There were only three trees for like 30 years before people noticed that they tasted rather good. All Macintosh apples today are grafts of the one surviving tree.



  • Tlaloc_Temporal@lemmy.catoScience Memes@mander.xyzBanana
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    2 months ago

    That old version “Gros Michel” is what artificial banana flavour is based on. Bananas used to taste like that. The newer “Cavendish” variety is firmer and lasts longer, but doesn’t have the same flavour. It seems like both are being wiped out by disease though, yay monoculture.

    Cavendish seem to be especially vulnerable because they’re all clones. They don’t produce viable seeds, so they’re grafted to new plants.