Wouldn’t the planet rapidly start to cool? I think we’d be dead by morning
Gottem. :)
Submitted 3 months ago by fossilesque@mander.xyz to science_memes@mander.xyz
https://mander.xyz/pictrs/image/30c63b15-c0f1-4808-bdb8-20d3f5bd16bf.jpeg
Comments
burgersc12@mander.xyz 3 months ago
rockerface@lemm.ee 3 months ago
Atmosphere would hold the heat for a bit, the real issues will begin with food shortages because the crops won’t grow
bobs_monkey@lemm.ee 3 months ago
Yeah but how long is a bit? Also, without the gravity center of our solar system, how long would it take for all the planets to start drifting off into the void?
Psythik@lemmy.world 3 months ago
The core is still hot. If we bury ourselves deep underground, there is a chance the humanity could survive for thousands of years without a sun. If not humanity, then some sort of life will survive long enough for future archeologists to find it millions of years later.
But don’t quite me on this; I’m simply reciting from memory something I read in National Geographic or a similar publication 10-20 years ago. IDK how true this actually is.
LovableSidekick@lemmy.world 3 months ago
We would need enough advance notice to prepare for massively farming mushrooms or something underground to eat. Canned food will run out in a few years, even military MREs have a shelf life. A few lucky people might survive a generation, but there’s a minimal breeding stock requirement to avoid degeneration from inbreeding. Extremely long odds, I think the human race would only survive this event in a sci-fi fantasy story.
JustAnotherKay@lemmy.world 3 months ago
If we bury ourselves deep
burgersc12@mander.xyz 3 months ago
Yeah, something will live, but I was more thinking surface life.
philthi@lemmy.world 3 months ago
Doesn’t the earth itself provide a significant amount of heat from the core? I’m sure I read somewhere that for something like every 10 meters down you dig, the temperature raises by 1° celcius. So maybe we’d not notice a temperature drop so quickly?
rockerface@lemm.ee 3 months ago
The surface would eventually freeze over. But some life would almost definitely survive deep underground and underwater, near geothermal vents not unlike those that hosted the first lifeforms on Earth. And, maybe, in some billions or trillions of years, Earth would stray near another star system, get captured by its gravity and slowly thaw out, restarting the evolution of life.
burgersc12@mander.xyz 3 months ago
Not sure how quick exactly, but the earth doesn’t provide enough heat, not even close. I think Kurzgesagt has a video on this subject, pretty sure without the trillions of joules of energy showering the earth every second we’d get awfully cold awfully quick
potustheplant@feddit.nl 3 months ago
The moon also doesn’t emit it’s own light. It would take longer for the moon to “disappear” than it would for the sun but it wouldn’t be the whole night.
philthi@lemmy.world 3 months ago
I agree with you, but also… I’m not sure that I’d notice that I could see the moon a few minutes ago and now I can’t (unless I happened to be looking at it as it happened)… I feel like that is something that could be happening every single night and I’ve never noticed.
The sun disappearing is like… Super noticeable by comparison.
5too@lemmy.world 3 months ago
The moon is just a few light-seconds away from earth; that’s why they could have conversations with ground control during the moon landings. Moon will go dark a few seconds after the sun.
LovableSidekick@lemmy.world 3 months ago
Wherever you live on the Earth’s surface starts cooling every time the sun goes down, and gets warmed up again the next day. It wouldn’t cool any faster if the sun went away, it would just keep cooling at the same rate until the surface eventually froze.
burgersc12@mander.xyz 3 months ago
Yeah, but that’s with petawatts being blasted on the other side of the earth, wouldn’t the loss of that make the whole system cool down faster, including the side the sun doesn’t touch? I’m thinking it’d be like having food on a hot plate, bottom is very hot, the top is less hot. But if you take the food off the plate the whole thing rapidly goes to room temp. I honestly have no idea, just conjecture tbh.
Evilsandwichman@hexbear.net 3 months ago
False; no sun = no morning!
burgersc12@mander.xyz 3 months ago
So extremely cloudy mornings = no morning? lol just kidding!
Hupf@feddit.org 3 months ago
lord_ryvan@ttrpg.network 3 months ago
That’s a good way to infinite wishes.
TheOakTree@lemm.ee 3 months ago
I wonder if we would feel the sudden disappearance of the centripetal force of gravity.
Voyajer@lemmy.world 3 months ago
After 8 minutes
mipadaitu@lemmy.world 3 months ago
scienceprimer.com/lunar-and-solar-tides
Yes, the tidal effect of the sun would disappear, and that would probably make the oceans all fucky suddenly (after an 8 minutes lag).
Alk@sh.itjust.works 3 months ago
Does gravity travel at the speed of light?
apotheotic@beehaw.org 3 months ago
After 8 minutes, almost certainly
itslilith@lemmy.blahaj.zone 3 months ago
Gravity isn’t a force, strictly speaking. Objects move along geodesics in spacetime (that’s basically a straight line along a curved surface), and gravity bends spacetime, and therefore also these geodesics, around massive objects. So you don’t actually get accelerated by gravity, that’s why you don’t feel anything during free fall. What we perceive as the force of gravity pushing us down, is the solid ground accelerating us upwards, when following the geodesic would have us fall instead.
So when the sun disappears, the geodesic that used to spiral around the sun suddenly straightens out, and the neutral movement, the new free fall, has the earth continuing in a straight line. You wouldn’t be able to feel that. What the other person said about tidal forces is true tho, it would likely cause worldwide tsunamis
KillingTimeItself@lemmy.dbzer0.com 3 months ago
i mean, if the moon is up there, the light first has to bounce off of the moon, and then back to earth, so yes, it would most definitely take longer…
Klear@lemmy.world 3 months ago
the light first has to bounce off of the moon, and then back to earth
That’s a second, more or less.
KillingTimeItself@lemmy.dbzer0.com 3 months ago
that is still one second longer so.
aeki@slrpnk.net 3 months ago
This reminds me of Inconstant Moon by Larry Niven! Time for a reread.
floquant@lemmy.dbzer0.com 3 months ago
I wonder how long before you would feel it becoming colder
piccolo@sh.itjust.works 3 months ago
If you ever experienced a solar eclipse, you will feel drastically how much the temperature changes.
nightofmichelinstars@sopuli.xyz 3 months ago
Even the difference between standing in shade and standing in direct sunlight on a sunny day is noticeable.
Evilsandwichman@hexbear.net 3 months ago
Forget colder, I kind of feel like we’re missing out on not hearing the sun thanks to space
BenLeMan@lemmy.world 3 months ago
In a sane world this would earn you a dunce hat. In this one it will earn you a position in the gubmint.
lord_ryvan@ttrpg.network 3 months ago
Is a position on the gubmint good or bad?
BenLeMan@lemmy.world 3 months ago
Well, the U.S. government is the greatest freakshow on the planet right now.
Would you like to be in it? If so, a position can be yours for as low as $2.5m. Hurry up while vacancies last.
deaf_fish@lemm.ee 3 months ago
Teacher: I meant the global we. So it would average out to 8 minutes.
mexicancartel@lemmy.dbzer0.com 3 months ago
Someone at day will inform sun is missing to the people on night
deaf_fish@lemm.ee 3 months ago
A person can’t inform others faster than the speed of light.
ColeSloth@discuss.tchncs.de 3 months ago
But will we feel the shift in gravity as the planet starts moving straight?
0ops@lemm.ee 3 months ago
This is the cutting-edge of my understanding so if I’m wrong somebody call me out, but I think because gravity is warping space-time and not actually pulling anything, we wouldn’t feel an inertia change. Our inertia would be maintained, but the space-time we’re going through would suddenly be shaped different, so we’d follow a new path
mipadaitu@lemmy.world 3 months ago
The part you’re missing is that earth isn’t a point in space. That’s why there’s tides caused by the sun (which are different than tides caused by the moon)
A person wouldn’t feel the difference, but the tides would slosh back when the solar gravity stops effecting them.
Etterra@discuss.online 3 months ago
So would all the other planets, so there’d be a non-zero chance we’d smack into one of them. Most likely though we’d become a very, very cold rogue planet.
stebo02@lemmy.dbzer0.com 3 months ago
yes, after 8 minutes
ColeSloth@discuss.tchncs.de 3 months ago
I know gravity moves at the speed of light. I’m just referring to the slight pull of the gravity and the sudden shift to traveling straight off instead of a circle.
LovableSidekick@lemmy.world 3 months ago
I really doubt we would notice, because then gravity would already feel different during the day and night. Technically the sun pulls us away from the Earth in the daytime and toward Earth at night. Also toward the east at sunrise and the west at sunset. I don’t think we ever feel this.
kopasz7@sh.itjust.works 3 months ago
We are in “free fall” around the Sun so that’s why we don’t feel its pull of gravity.
You would similarly feel weightless if you were in an orbit around Earth.
AdrianTheFrog@lemmy.world 3 months ago
If it happens at night it will probably take 5 or 6 seconds longer for people to start seeing the first messages on the internet
Simulation6@sopuli.xyz 3 months ago
What about gravity? I know I read something about this once, but is gravity also limited to the speed of light?
Valmond@lemmy.world 3 months ago
Yeah, we’ll feel it after 8 minutes all right :-)
Gravity travels at the speed of light.
BigDanishGuy@sh.itjust.works 3 months ago
Does it? In my experience alcohol can delay gravity
WanakaTree@lemm.ee 3 months ago
Yep, it is. We’d stay in our orbit of the sun for 8 minutes after it vanished too
colmear@discuss.tchncs.de 3 months ago
From what I know, particles that have a mass greater than 0 move below the speed of light and can never reach it. Particles that have no mass (every force is transferred via particles) move at the speed of light. So there is no way to have anything that is faster than the speed of light, not even forces.
jol@discuss.tchncs.de 3 months ago
But do we know that gravity is a force transfered by a particle yet?
someguy3@lemmy.world 3 months ago
The telephone: “Am I a joke to you?”
grrgyle@slrpnk.net 3 months ago
Who would leave their sound on in the middle of the night?
humanspiral@lemmy.ca 3 months ago
I believe we’d still be warm for those 8 minutes. We have an 8 minute grace period before having to do anything, then enough time to add sweaters faster than earth cools.
Naz@sh.itjust.works 3 months ago
I was forced to calculate the black body temperature and radiation for the Earth, back in college by hand.
I decided for fun to zero out the sun from the equation to see what would happen.
My math came out to about -32°C average surface temperature.
Earth would become an ice planet.
I think you’d uh, need a bit more than a sweater in those conditions 😅
humanspiral@lemmy.ca 3 months ago
It’s sweaters all the way down. You have time to order from China shipped by boat before -32C happens. You’re just being a “save the sun” hippy climate alarmist /s
meliaesc@lemmy.world 3 months ago
People live in those temperatures in places like remote Russia, right?
prettybunnys@sh.itjust.works 3 months ago
So.
The Antarctic. Roughly. Everywhere. Including the equator cuz that’s not a thing anymore.
Are there any places that would be “warm” for any reason if you recall?
Like, I assume the oceans would survive until the core stops and the planet truly dies?
IDKWhatUsernametoPutHereLolol@lemmy.dbzer0.com 3 months ago
That’s boring.
Can we just have the reverse, like a “When Day Breaks” scenario? At least its fun.
Narauko@lemmy.world 3 months ago
The real question is if the earth becomes a rogue planet or if Jupiter captures most/all of the remaining solar system. Jupiter is technically a failed star, so could it finally get it’s glowup from being the sun’s understudy and keep us all together until we fall into the gravitational well of a new star?
GrabtharsHammer@lemmy.world 3 months ago
For further reading, see Galaxias by Stephen Baxter.
jjagaimo@sh.itjust.works 3 months ago
But not by much longer. People on the other side of the world or connected to satellites monitoring sunspots would notice pretty much immediately after the light ceases to reach the earth
5too@lemmy.world 3 months ago
And even if you’re not connected at the moment, the moon will go dark.
LovableSidekick@lemmy.world 3 months ago
Good one! If the moon isn’t visible and you were just sitting outside say at midnight, I wonder if you would notice anything different.
affiliate@lemmy.world 3 months ago
yeah but everybody else would be sleeping so it would still take longer
LovableSidekick@lemmy.world 3 months ago
Most of us sleep at night and don’t check our info-hose feeds until we wake up.
IDKWhatUsernametoPutHereLolol@lemmy.dbzer0.com 3 months ago
What’s sleep?
looks at time that says 23:27
ILikeBoobies@lemmy.ca 3 months ago
Only if you believe in magic box or “radio”
Galapagon@sh.itjust.works 3 months ago
No dude, it’s only a difference of 1.3 seconds, faster then the Internet unfortunately.
teije9@lemmy.blahaj.zone 3 months ago
the other side of the world wouldn’t notice there suddenly being no light anymore if there wasn’t light in the first place.
they would notice that the moon disappeared though
M137@lemmy.world 3 months ago
Ok, first thing, did you not understand the image is a joke? Secondly, you have failed so badly at trying to use logic. And you’d notice it everywhere on the earth, both because of the moon and also just light scattering, it would become darker than ever before. And as said, most people would be asleep on the dark side, which is obvious. And it’s not like the astronomers etc. have some kind of worldwide siren to get everyone’s attention, most people wouldn’t notice it for a while, even if they posted about it online.