If we see Betelgeuse go supernova now, it actually happened roughly 500 years ago. 🙂

If it exploded right this second.........nothing. I wouldnt live to see it because of the time it will take for the light to reach us.

We'd all wait 700 years to have surprised expressions

Astronomers, the ones who know what they're talking about, are saying that it's too far away to hurt us.

A star went supernova in the Pinwheel Galaxy visible in 2023, I'm lucky enough to have taken a picture (as did many others) of the Galaxy prior to and after the supernova. It only looked the a new star popped up but it was really cool to see with the knowledge of what it actually was.

When you look at the constellation Orion, at Betelgeuse, you see it not as it is now, but as it was centuries ago. It takes light that long to get from Betelgeuse to here.

This gives you an idea about distances in space. Light can travel around the earth about 7 times a second, betelguise could of already exploded before Shakespeare was born, the light just hasn't reached us yet 😮🤯

Your video title promised some wild speculation on what would happen to the Earth today if Betelgeuse went supernova... And it did not deliver! I should have known better when I didn't see an apocalyptic thumbnail image for the video.

I was taught that it's to far away to have any real effect on us. Although, it would be bright enough to light the night sky for two weeks. It would be lit up like dawn.

There will be a bright light in the night sky. There will be a brilliant light show for anyone here to see. Over a period of months to a few years it will gradually fade from view. Beyond that, we are in no danger from Bettalguese.

With my luck, I'll probably be having a nap and miss the whole thing.

Before working in astrophysics were you the voice of Huckleberry Hound? That would be so cool

when you have black holes and neutron collisions eclipsing its host galaxy by folds of magnitude it truly puts into perspective our tiny little star in how easily life can be extinguished by such an explosion.

In the universe there's no such thing as now.

It's so fascinating how we haven't even really left our own backyard yet we already know this much about the life and death of certain objects across the cosmos. It's truly impressive.

"now" in astronomy means mostly our lokal time when we know or see it.

It might have already gone supernova but since it's about 640 light years away, we wouldn't see its light image for (640 - x) years. x equals the distance in light years the supernova light image has already traveled in the vastness of space.

Interesting and informative. I would suggest one thing, though. When you cut to captioned illustrations, they are not on screen long enough to both read the caption and look at the picture. Either give a few seconds longer to each slide, or remove the caption and speak it, while the viewer looks at the picture. Other than that minor point, this was most enjoyable.

If Betelgeuse went supernova today, we wouldn’t see it until about 640 years from now.

Great video first time seeing your channel in my feed liked and sub’d…. When bettlejuice does go nova do we know if there are any planets in its orbit and will we be able to detect the impact on them??? Many thanks for sharing 🍻👍

Thank You for the Great Tour

great video, thanks for posting

The probability that supernovae themselves can induce detectable ripples in spacetime detectable in gravitational waves is pretty unlikely to occur and to be detectable would likely require a LIGO type observatory in space on a magnitude of close to the Earth - Moon orbit. Ninety-Five percent of the mass of a Super Nova stay relatively close to the star during the gravitational collapse of the star and resulting expulsion of the outer layers of the star resulting in much of the mass collapsed into a white dwarf but still gravitationally stable in essence with relatively much the same spacetime gravitational annealing in place but expanding only due to the materials shed.

AWESOME!! Can't wait!!!

Excellent narration!

In answer to the title question, as far as we are concerned, not a lot. Because even light takes time to travel the vast distance, it would take a number of years for that light to reach us. So, Betelgeuse could explode now, and we wouldn't see the light of it until it reached us... As for the tag, 'We're not ready!', we don't have to be. Betelgeuse is too far away from us for any harmful effects to reach us. At best we'd have a second bright light in our sky during the day, but that's about it. That and the fact that the constellation Orion will forever be missing a key component, that is.

At 650 light years away, nothing would happen except a very bright spot in the sky for a brief time.

Well made video!

For some reason I always trust the British accent for narrating space/scientific videos over the American....

Great video❤

You kidding? We aren't ready if it freezes, and a water pipe bursts.

We would know nothing for over 500 years since it's over 500 light years away.

We wouldn’t know about it for quite some time. It’s that whole speed of light thingy. 👍

It's 2 months later, and watching it happening live online now

We should have a few years warning by monitoring any untoward effects on Sirius.

Are the extra dimension springs for space time to rebound

Shouldn't we be able to witness countless supernovas at all times due to the sheer volume of stars out there?

Van Gogh inadvertently captured a supernova in his painting “Starry Night”

I recall reading an article that stated Einstein never called general relativity a theory , it was a German scientist in 1906 who said it was !

The dimming observation happened 5 years ago. That is hypothesised to be dust emission. The question is how long does a supernova take to happen once a significant material emission has taken place? If this question can be answered then the supernova time could be guessed. The whole thing is like the date of release of prepaid games. Speculation.

724 light-years away from Earth. We're safe, completely safe.

🙇‍♀️”..Amazing!”

It would be nice display, especially in the evening.

This video told of what happens when a star experiences a supernova explosion and what the cosmic particle emissions from a supernova could do to any nearby planet's biosphere and atmosphere. It would have been interesting if the video how Betelgeuse going supernova might impact Earth, 600 or so years after it went supernova.

A spectacular spectacle.

05:07 The star emitted this large dust cloud roughly 700 years ago and we saw it in 2020 because of that huge distance. So if Betelgeuse bursts right now we wont notice for another 700 years. But if we were to see it in our lifetimes it would be quite a spectacle, something our modern human society has not experienced yet.

In space no one can hear your supernova explode.. But definitely see it 😄

"What Would Happen If Betelgeuse Burst Right Now?" Absolutely NOTHING to us, at least not until 642.5 years from "right now".

There. Are u happy? Everyone dies" LOL

I’m currently watching the live streaming for it right now!!! lol that’s wild.

I understand that astronomers say that gold is produced not buy a supernova but by neutron star collisions

If it exploded just now, what would happen to the earth? Nothing right now! Betelgeuse is some distance from us, Astronomers suggest 422 +/- lights, but the distance is debatable. Some astronomers suggest that the earth is too far from us but honestly that can be debatable. Let’s say it did blow and it has since gone supernova, we will not know for 500 years. However I saw a story about Polaris the north star, that star is acting up. But if we were much closer, better pray….

We are likely to experience a micronova from our own star, the Sun, before we experience Beetlejuice going supernova.

"We're not ready", yeah only because orion without betelgeuse wouldn't be the same

Obviously you think betelgeuse is a balloon

If it exploded this very second i understand that we will not see it for many years to come due to the massive distance light has to travel in order for us to see it. But could the JWST see it fairly soon after it actually exploded due to it being able to look extremely long distances?

Actually because BeetleJuice is NOT a Main Sequence Star and is in its Red Giant phase and because its distance is greater than 320 light years away (the maximum for deriving distance by Parallax), there are some rather large error bars on its distance, somewhere between 550 light yrs and 650 light yrs. One might think that when Voyager traveled beyond Uranus, it would have faced its cameras at Beetlejuice to get a more precise Parallax distance measurement. Maybe that did happen.

Last I checked, Betelgeuse was tilted the wrong way for a supernova to affect Eearth much, at least as of now. If we were looking into one of its poles when it went off, we'd be in trouble, though…

Why are so many bot channels talking about betelgeuse recently? It's fluctuating luminosity was in the visible spectrum, but not the infrared. This means it's energy output was normal and it "dimmed" because dust or debris blocked visible light. Another channel wins a "Do not recommend" award.

I want to congratulate you not only is your information correct, but that you also hired a human to read it! I'm already tired of the AI bulshit on KZfaq. Thank you for this post.

It would take radiation traveling at the speed of light to reach us from Betelguise exploding about 752 light years. Any blast debris would take thousands of years to reach Earth.

If people could stop using "theory" when they actually mean "hypothesis", I would be so happy.

You would see it in around 645 years because that is how far away it is in light years.

A leading astrophysicist has said that we MIGHT see this with binoculars...maybe!

What about kilonovae and hypernovae and novae?

its light is fluctuating again , the current hypothesis is its boiling

What spectral stars nova and hypernova?

If it burst right now we'd have 642 years to get ready. However, if we SEE it burst today....

I heard that the star already exploded and it’s expected that we can see it soon

If it went, we would be fine since we are good distance away. FYI, Betelgeuse has dimmed many times in the past....almost cyclical in nature.

What happens if Beetlejuice go supernova, ONE HELL OF A LIGHT SHOW.

It would be a spectacular spectacle!

I work graveyard shift and watch it nightly hoping I will see it as it blows. 😱💥

IF it does, we all would "sorely" miss it.

It likely already went supernova a long time ago. The light just hasn’t reached us yet.

Wow!

This ridiculously named star is approximately 643 light years away from us here on Earth. So, to the naked eye, are we looking at it & observing its state 643 years ago? How does that really work actually? Through our most powerful telescope, are we able to see any further out into space to cut some of the time/distance? If it had exploded into supernova 642 years ago, would it just light up our sky & hit us all @ once?

Space and time become other things when taking the scale of galaxies and the universe into account. "What would happen if Betelgeuse burst right now?" - well - we wouldn't know for another 640 years . . . so, who knows - the whole thing could've gone off anytime during the past 600+ years - so, "right now" doesn't mean much . . .

If it bursts now we won’t have to worry about it for a few million years.

wasnt there a supernova named 1987A

KZfaq really needs to have a rating system that reflects viewer interest based on how long they view the video and likes vs dislikes. This video actually has nothing to do with the title.

642 light years away = beautiful = so it would be a magnificant display in the sky and = WE ARE ALL FAFE = for our lifetimes at least = BLESSINGS TO YOU ALL !

A pretty light show !

We live in a universe where objects are placed unbelievably vast distances apart, and the speed of light or rather the speed of electromagnetic radiation is such that it takes massive amounts of time for this radiation to travel between these sparsely spaced objects. So Beetlejuice is over 600 light years away from planet Earth. Anything that happens in current time at Betelgeuse will take over 600 years for us to observe it. It could have already had its supernova, but the electromagnetic radiation that we would observe of that event hasn't gotten here yet. Everything that we observe about our universe is in the past.

a bright light in the sky, not visible on Earth for a long time

if it went bang right now we wouldnt know, its like that dimming it had not long ago for us happened around 500 years ago

If it exploded right now, we wouldn't know it happened in my lifetime.

Imagine what ligo would pick up if it happened soon.

Sorry everyone, Betelgeuse have already gone Supernova. We will know when we feel the effect of it.

I love the graphics

If I am to understand, all these events happened 650 years ago??? What's considered as a Near By Super Nova?

I like the way they try to scare you with the title.

If Beetlejuice goes supernova right now, We will see the impact in around 600 to 700 years. So I'm not worried.

At such distance only a hypernova or GRB could be dangerous, but Betelgeuse doesn't have the mass and rotation rate required for both and will explode as a standard harmless IIP supernova, not brighter than the full Moon.

06:35 f How long a star stays a main sequence star also deprnds on its mass: Very massive stars - those which will go supernova eventually - only stay so for hundreds, tens or less of millions of years. Stars like Sun stay so for billions of years, and red dwarf stars may stay so for up to trillions of years.

Though Beetleguese is unstable, it could last another 1.000 years, or even 10,000 years or 100,000 years before going Nova. Nobody can predict when it will explode .

if it goes right now we will have to wait 640 years before it show to us

Why dies the narrator say type "eye" a and "eye" other letters, but when he speaks of Type II suoernova, he then switches to numbers, saying two instead of double "eye" or "eye 👀 eye." Strange.

Yes but what about the ones that have gone supernovas unkown to us further away coming at us.

There'd be a lot of guys walking out with a snile on their faces.