It goes to 9 minutes from 8, since every single communication gadget will yell out that the sun has disappeared as reports come in from the other side of the earth.
this post was submitted on 08 Aug 2024
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Depending on the lunar cycle, the night time side would notice the moon become dim.
~~dim~~
Disappear
Well technically there'd be earth glow so it wouldn't be totally dark.
Earthshine from where? That's still reflected sunlight! Maybe a tiny amount of cityshine, but the light pollution from those same cities will far outshine that.
Like you said, artificial lighting. Technically you'd get some IR from the planet itself which could get converted to visible light but definitely not nearly enough to be noticeable. You'd also probably get about 3 seconds of real reflected sunlight before that also goes away.
Now I am curious, somebody explain. if it just stopped burning, would we know after 8 mins, if we lived on the opposite side?
Moon would "disappear" when it no longer reflected Sun's light.
It would also start getting very cold fast
Any visible planet or asteroid would. So some stars would also appear to blink out, but those would take longer to blink out. So the moon would go after 8 minutes, Jupiter would take 43 minutes to stop receiving light, and another 35-52 minutes to disappear for earth depending on orbital locations.
Presumably we would get something on radio/tv/internet from the side facing the sun once they realized it, that of course being only if they hadn't already been eradicated by a horrific shockwave caused by whatever event caused the sun to vanish before they had a chance to report what they saw, because supernovae tend to travel at very close to the speed of light, so there wouldn't be much time for them to react.
And if this is a supernova, you might just have time to grok what happened before the planet was obliterated under your feet from the shockwave.
So I guess... chances are we would just barely understand what happened before we were gone.
It’s kind of odd that it doesn’t matter for a single human whether they die from sudden car accident or get obliterated by supernova. Both events feel equal
The moon might be on the daylight side, so we wouldn't necessarily observe that.
I wonder how cold how fast.
I'm more interested in how long before we freeze to death.
How long will the earth's atmosphere hold onto its heat?
The classic sci-fi short story A Pail of Air touches on this.
I'm more interested in how long before we freeze to death.
Kurzegesagt did a great video on this thought experiment: https://www.youtube.com/watch?v=gLZJlf5rHVs&t=1
The moon would disappear though, so you'd notice by looking at the sky if it wasn't obstructed by clouds.
Only if the moon is on your side of the planet at the time and not already eclipsed by earth's shadow.
We are however very connected. That shit would be global news immediately.
If the sun disappears when? According to GR's conception of simultaneous events, it disappears immediately.
Which two event are you talking about being simultaneous? The Sun going out and Earthers observing it? Those things will not be simultaneous in any reference frame, because they are "light-like" separated. (ie they lie on a 45 degree line in a Minkowski plot.)
Yep. Imagine you’re off in space such that you, the sun, and the earth make an equilateral triangle. The sun disappears, then after 8 minutes you see it disappear. Then after ANOTHER 8 minutes you see the earth go dark, because that light had to cover two of the 8-light-minute long legs of the triangle.