For further reading, see Galaxias by Stephen Baxter.
Teacher: I meant the global we. So it would average out to 8 minutes.
Someone at day will inform sun is missing to the people on night
A person can’t inform others faster than the speed of light.
Fraction of a second for transmitting information from one side of earth to other side. And teacher only said 8 minutes and the seconds are ommitted as there is always an error margin since distance from sun is not constant.
Also i assume signals are always sent from other side of the earth
But collectively nine women can have a baby in one month.
this guy money balls
But will we feel the shift in gravity/inertia as the planet starts moving straight?
I really doubt we would notice, because if so we would already be feeling different during day and night. The sun pulls us toward the sky during the daytime and toward the ground at night. Also toward the east at sunrise and the west at sunset. But none of this seems noticeable.
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.
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
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.
How do you figure? Space is fucking huge. I don’t see how any planets could collide.
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.
yes, after 8 minutes
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.
All of that will only happen after 8 minutes, see this comment.
Earth has a circular orbit because space-time is curved by the mass of the sun. (Think of a large bowling ball on a trampoline, you can make a small ball travel in circles around it, and if there was no friction, it would go on indefinitely.) When the sun’s mass suddenly disappears (by pure magic, as this would violate many laws of physics), spacetime would flatten out, at the speed of light.
What part of “I know gravity travels at the speed of light” do you not understand, to make you think you’re explaining something to me?
the fact that you don’t understand how the pull of gravity wouldn’t disappear immediately
Lol. You’re a damned idiot. I’m not really sure you can “learn” basic reading comprehension, but maybe you’ll manage it someday.
yes I am the idiot
What about gravity? I know I read something about this once, but is gravity also limited to the speed of light?
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.
But do we know that gravity is a force transfered by a particle yet?
Yeah, we’ll feel it after 8 minutes all right :-)
Gravity travels at the speed of light.
Does it? In my experience alcohol can delay gravity
Yep, it is. We’d stay in our orbit of the sun for 8 minutes after it vanished too
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.
it’s because light takes 8 minutes to get from the sun to us. and since gravity also travels at the speed of light our orbit would only change after 8 minutes.
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 😅
People live in those temperatures in places like remote Russia, right?
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. Energy company shareholders would benefit from high demand, so saving the sun is just selfish of you :P
We’re for the jobs the fossil fuels will provide.
I’m just imagining you shuffling out wearing six layers of different colored sweaters on the frozen tundra surface, lmao
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?
… so yes, the oceans could remain warm enough to harbor life still.
I wonder how long it would take before you would feel it becoming colder
Forget colder, I kind of feel like we’re missing out on not hearing the sun thanks to space
If you ever experienced a solar eclipse, you will feel drastically how much the temperature changes.
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 and would tell everyone else over the internet
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.
yeah but everybody else would be sleeping so it would still take longer
Only if you believe in magic box or “radio”
Most of us sleep at night and don’t check our info-hose feeds until we wake up.
deleted by creator
No dude, it’s only a difference of 1.3 seconds, faster then the Internet unfortunately.
And even if you’re not connected at the moment, the moon will go dark.
Good one! If the moon wasn’t visible at the time and you were just sitting outside say at midnight, I wonder if you would notice anything different.
It would turn pitch black. So dark the stars far away would be the brightest when compared to everything else. It would be scary.
According to astronomers the sun doesn’t have a measurable effect on the night sky when it’s more than 18 degrees below the horizon. So I doubt naked-eye observers would notice.
Certainly not with all the light pollution.
In a sane world this would earn you a dunce hat. In this one it will earn you a position in the gubmint.
Is a position on the gubmint good or bad?
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
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…
the light first has to bounce off of the moon, and then back to earth
That’s a second, more or less.
The telephone: “Am I a joke to you?”
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?
If the sun just disappears, I doubt even having another sun would keep everything from flying off to fuck knows where. Jupiter, by comparison, is beyond hope. The Barycenter is far from Jupiter.
And now for the segue into a shower thought - so the first thing night side would notice is the Moon disappearing (if it’s in the night sky), but after that, how long before effects begin to suggest something is seriously wrong on the day side. Something tells me it will be sooner than the morning.
The first measurable thing that would happen is that we would stop orbiting the sun, since (counter to what my 12-year-old ufo-believing self thought) gravity also travels at the speed of light.
I’d assume after 8 minutes the people on the day side would notice and all media would blow up, so hopefully you’d be asleep and wouldn’t have to worry :)
But all the solar panels will stop working so there will be no electricity. Batteries would run out and any other source of energy would be destroyed by people who started a cult worshipping the Sun hoping it would reappear
So no social media on the part of the Earth that would notice the disappearance of the sun. The other side wouldnt have any problems with electricity since they wouldnt have the Sun-worshipping cult
worry
I, for one, welcome the inexplicable annihilation of the sun
Yeah! Fuck you, Ra! I got sunburned on Lake Powell!
The ocean would revolt.
Cool writing prompt: Elusive Dawn
I wonder how long till everyone was dead. And what would be the last living species.
My guess is that bacteria down in the crust near thermal vents would live the longest. Thousnands of years if they are able to follow the heat down.
Figure bunkered people might make it a few months depending on their power source and ability to withstand dropping pressure. Not sure how long it would take for the atmosphere to freeze. Government bunker that is vacuum proof with a reactor might make it a decade.
I wonder if we would feel the sudden disappearance of the centripetal force of the sun’s gravity.
After 8 minutes
http://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).
Does gravity travel at the speed of light?
Yes. General relativity.
Of course. It can’t travel faster
The speed of light is more than just the speed of light. Nothing can travel faster than the speed of light. Not particles, not gravitational waves (waves and particles are actually kinda equivalent anyway), not any kind of “information”.
Consequently, if two events occur in a way that a particle would have to travel faster than the speed of light to travel between them, then it’s impossible for one of those events to be caused by the other. They must be unrelated. So the soonest we will see any effect of the sun blipping out of existence, whatever the medium (light/gravity/??), is after 8 minutes.
What about quantum entanglement? Is that also limited to the speed of light?
Interestingly it’s not, but the thing is that you can’t actually use quantum entanglement to send information from one particle to the other, so it does not violate the principles of special relativity.
So usually this is explained with two scientists, Alice and Bob, on far away planets. They’re each in the possession of a particle that is entangled with the other, and in a superposition of state 1 and state 2. When Alice measures the state of her particle, it collapses into one of the states, say state 1. When Bob measures the state of his particle immediately after, before any particle travelling at light speed could get there, it will also be in state 1 (assuming they were entangled in such a way that the state will be the same).
Due to special relativity, for some observers it could actually have been Bob who measured the state of his particle first, before Alice did. In the end, it doesn’t really matter. They both got the same information: “state 1”, but since they can’t control what state the particle will collapse to, no information can be exchanged between Alice and Bob.
In quantum encryption, it is that bit of shared information that Alice and Bob can use as a key to encrypt and decrypt messages, but those messages are still sent the old fashioned way, using light waves traveling at light speed.
The gravity does not travel, the gravity is.
Changes in the gravitational field definitely travel, and do so at the speed of light.
Look up LIGO
If it didn’t travel, it wouldn’t take 8 minutes to stop right?
If the mass vanishes, then the gravity would also vanish, at the same time.
But vanishing is magic, it goes against the laws of physics, so you could apply any fictional logic
False. If the mass vanished via magic, the effect would ripple out at the speed of light. Source, gravity waves which move at the speed of light.
After 8 minutes, almost certainly
