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Title text:
They're up there with coral islands, lightning, and caterpillars turning into butterflies.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3135/
There are places in the solar system where the tide rips new mountains up every go around.
That’s metal AF
... some metal band (Dethklok?) recording their song/filming their vid/having the concert on such a moon - the guitar solo intensifies as the band is lifted upwards by a soaring mountain, epicly, with lava flows.
I think it's funny that Dethklok is both a parody metal band and one of the best metal bands around. I don't even really like metal and I love Dethklok.
that's nothing compared to Disaster Area, who need to evacuate a whole planet due to their sound system
True!
Going further - "tides" actually rip planets & stars fully apart (binary star systems, around black holes, yo mamma casually strolling through a galaxy).
Io.
I remember never believing my parents when they explained it to me as a kid. Clouds being caused by cigarette smoke was reasonable but the moon pulling out the ocean seemed too outrageous.
As a child, my friend was told by her mother that wind occurs because people group up and blow really hard.
Everyone was taught the tides look like two giant water bulges going around the earth in line with the moon.
That representation is oversimplified and false.
This is how the tides look like at a global level. It’s messed up.
Been trying to learn about the tides around here so I can tell what I'm seeing on the water. Imagine my joy when I found a Casio, which I collect, with tide and moon phase indicators!
And that's when I learned the Gulf Coast is strange, has diurnal tides (twice a day) the watch can't predict. Took me an hour and a half to figure out it would never function. The moon phase works!
Huh. TIL that there are three common types of tidal cycles and which one you get depends on geography, location, ocean currents. https://beltoforion.de/en/tides/tidal_cycles.php
And yeah, dinural is apparently the most rare of the three. Wild.
the Gulf Coast is strange, has diurnal tides (twice a day)
Diurnal tides are once a day (semidiurnal is twice a day). By the Gulf Coast, I guess you must mean the Gulf of Mexico. I'm living on the other side of the world in the other diurnal region, so I assume our tides are synchronised!
Tides in the Bay of Fundy, Canada are 16 metres (50 feet).
See, that's the part that confuses the hell outta me. How can water be higher in one spot than others just due to the Moon's gravity? Yeah it's the geography of the area, got it. But still, how?
Imagine being out exploring new islands, not realizing its low tide. You setup camp for the night on an island that's relatively flat and close to current sea-level. Then while you're sleeping the tide comes in and washes your whole camp out to sea...
Come to the beach here in Bordeaux (well, on the coast) and see tourists set up their stuff at low ebb but forgetting they have to watch out for the flood.
There's an island near me that has a pedestrian causeway at low tide. There are huge signs warning to check tide times or get cut off, but still people don't get it.
if you are exploring islands you probably have a solid idea of how tides work.
You probably should, but that doesn't mean you do. It's not like anyone makes you take a quiz to go wander around outside.
Plenty of people get themselves into trouble all the time exploring places/things they know nothing about.
It's not like anyone makes you take a quiz to go wander around outside.
I knew it! I am so not answering any more of his questions, next time I go out.
WHAT! is your favourite colour?
Blue.
Edit: No! PINK!
...aaaahhhhhh!!!
people like you are why i love lemmy
i lived near the beach for a while and, uh, i have seen tourists do the stupid. i posit they count.
"Their moon is tidally locked" is an absolutely metal thing to say about a planet.
In the Bay of Fundy, Canada we have the highest tides in the world (53 feet high). It's enough to make some of the tributary rivers flow backward with the rising tide. I've seen it my whole life but it still amazes me to see a harbour completely empty of water with boats sitting on the bottom waiting for the tide to come back in.
I wonder if anyone has ever done the math on how much (in L or kg) water is moved by the moon each day. It's got to be something absurd.
Just wanted to mention I see your pfp on every post.
Thank you for keeping lemmy alive and making like 4% of the total posts. Seeing you post brightens up my day.
No homo.
Let's hope Lemmy grows big enough that I can just be part of the crowd.
I have to assume it's about one moon's worth, divided by the distance squared.
I think lightning would be crazy to anyone who never experienced a planet with it. Like, "WTF, sometimes your sky does what?"
FlatEarthersSayWhat
They'll just say the moon pulls the water around as it circles above the flat disc or something idk
But the moon alone doesn't orbit at the same rate as the tides. Alternatively they are fucking morons and shouldn't be respected so who cares.
And when Mercury is in retrograde, you can make an excuse for anything being kind of shitty or off.
There better not be mercury in my Gatorade!
Y'see, that's not quite how it works.
Nah, that's just Poseidon having a bad mood today. Just have to sacrifice your first child to make it stop for 10 years.
Well, tides on moons (eg around gassy supergiants :)) are fairly usual.
So perhaps it's not as much as the tides being "sci-fi" (sci??) but the relative size of Earth's Moon (it's basically a binary planet situation where they orbit around each other).
So, the sheer size of our moon as seen from the planet's surface is the rarity.
(Then again, on a moon around a supergiant the same experience could be had from one tiny beings pov.)
I live in an area with sea but almost no tide (although wind direction can have a pretty big effect on water level) and I have always felt that tides are weird man.