This widely watched live stream claims to show the Betelgeuse supernova in progress. But I can't find any information elsewhere

  • 47
    Arguably if Betelgeuse was going supernova and we could see it right now, it would have happened 642-643 years ago. Commented Aug 8, 2022 at 6:31
  • 10
    @DiplomacyNotWar Except that due to how simultaneity actually works in a relativistic universe as we currently understand physics, for us it would still be happening right now. Commented Aug 8, 2022 at 12:21
  • Old related post on Astronomy astronomy.stackexchange.com/questions/47523/…
    – James K
    Commented Aug 8, 2022 at 14:01
  • 11
    @AustinHemmelgarn: no, I don't think that's right. Simultaneity is well-defined in Special Relativity; see this paragraph in the relevant Wikipedia article. But of course people moving in different inertial frames won't in general agree on what events are simultaneous. The event of light from a distant start arriving at your telescope can't be simultaneous (in your reference frame) with the event of the light being emitted unless you are travelling at light speed yourself.
    – TonyK
    Commented Aug 8, 2022 at 19:28
  • 1
    Same video, same channel, different star: youtube.com/watch?v=Afm-ZzSRFvU
    – James
    Commented Aug 10, 2022 at 14:04

3 Answers 3


No, Betelgeuse is not exploding, and the video does not claim that it is. It carries the legend

Possible supernova explosion (just a guess)

That star will explode at some time, as reported by Science ABC

What Is Betelgeuse And Why Will It Explode?

Betelgeuse is a star that is expected to go supernova at some point in the next million years. Its death will be one of the most dramatic celestial events in our universe, and will be visible from Earth. Although the star is massive, and its death will be explosive, it is not close enough to Earth to have any significant impact on our planet.

There has been recent speculation that Betelgeuse is about to explode soon. Nature carried the story

Why the supergiant star Betelgeuse went mysteriously dim last year

Last year’s dramatic dimming of the star Betelgeuse — familiar to many as the ‘right shoulder’ of the constellation Orion — was caused by a cloud of dust spewed out by the star itself. Astrophysicists reached this conclusion, published on 16 June in Nature, using high-resolution imaging of Betelgeuse before and after the dimming, combined with computer simulations.
. . .
But many astrophysicists warned that the supernova speculation was wishful thinking. They pointed out that the dimming was likely to be caused by more mundane mechanisms, such as a blob of unusually cold matter appearing on the surface of the star in what’s known as a convective cell, or a cloud of dust crossing the line of sight to it.

However, astronomers have witnessed another, more distant, star that is exploding. Mashable reports:

Amazed scientists watched a giant star explode for the first time

There's a vivid, reddish star in the night sky. Called Betelgeuse, it's found in the famous constellation Orion and over millions of years has swelled in size, earning it the title of a "red supergiant." Betelgeuse, over 500 light-years from Earth, will eventually collapse on itself — or perhaps the distant star already has — resulting in a dramatic explosion called a supernova.

Until recently, astronomers had never directly witnessed a massive, aging star explode. But in 2020, astronomers atop Maui used a powerful telescope to detect an unusually active red supergiant, much more distant than Betelgeuse (at some 120 million light-years away). They watched it closely for 130 days, giving themselves an invaluable view of the grand finale. The resulting stellar explosion is called "supernova 2020tlf."

"We actually saw the star violently erupt," Wynn Jacobson-Galán, an astronomer at the University of California, Berkeley who led the research, told Mashable. "It's been something we wanted to find."

  • 5
    Hmmmm, then what exactly is "HAPPENING RIGHT NOW"? Commented Aug 7, 2022 at 16:23
  • 20
    The "Live feed". Although it'll not be clear 'till the end what the point is. Possibly an exercise in existential dread, maybe some stunt by Banksy. Just have to wait and see. @Abdullah Commented Aug 7, 2022 at 16:39
  • 3
    @Abdullah it had a run-time of about 20 minutes and I didn't wait to find out as I could not fast-forward it. If it shows a star exploding, it isn't Betelgeuse, but probably supernova 2020tlf as that is the only supernova to have been observed actually happening. Commented Aug 7, 2022 at 16:46
  • 5
    @SirHawrk, is getting a 1 good or bad? Not familiar with that grading scale.
    – Seth R
    Commented Aug 8, 2022 at 16:38
  • 2
    @SethR my bad its the best grade. In Germany we get grades from 1-6 with 1-4 being passing grades and 5 and 6 failing. They correspond to A-F in the states. Switzerland does it the other way around with 6 being the best and 1 being the worst.
    – SirHawrk
    Commented Aug 9, 2022 at 5:51

No, it is a looped video.

It is not possible to observe Betelgeuse from the surface of the Earth for more than 24 hours, with a few exceptions in the Antarctic winter. The rotation of the Earth takes Orion and Betelgeuse over the horizon every day, and the day/night cycle would have affected a live feed for a ground-based telescope.

The original question was asked over 24 hours ago and the feed is still going. The YouTube page says "Started streaming on Apr 6, 2022" making it over 4 months of "live" observation.

The time places them somewhere in UTC-04:00 which does not match any time zone in Antarctica.

The feed claims to be from a hobbyist ground based telescope (not James Webb which does not provide a live feed). Furthermore, the telescope in question has a "Max. useful visual power" of 500x while the feed claims to be 1000x.

It's unclear if this is even a looped video of Betelgeuse.

  • 1
    It also looks like it’s changing way too fast, supernovae happen more than every 10,000 years, the title is click bait with JWST, and it has a 5 minute countdown to a supernova which is clearly nonsense, and just there right keep people watching. (It just reset to 30 minutes)
    – Tim
    Commented Aug 10, 2022 at 16:24

No, Betelgeuse is not currently exploding. The live stream linked in the question may in fact be a live stream of Betelgeuse, but nothing is happening. Note that this answer is 20 hours after the question, and Betelgeuse is still entirely normal. Nothing is happening "right now".

There is a 30 minute countdown in the bottom right corner, and when it hits zero it jumps back up to 30 minutes. And does so over and over for as long as the stream is live.

I've no idea why the stream contains "James Webb Telescope" in the title when it is clearly not from the James Webb Telecope - aside from anything else the schedule for the telescope today is available online JWT schedule 2022/08/08 and at the time of the screenshot below, it is looking at HD-163296

There is a telescope description in the live stream: APM - LZOS Telescope Apo Refractor 254/2250 CNC LW II. This is a a purchasable telescope, not anything to do with JMT: APM Telescopes

Best guess: some amateur astronomer has heard the (mis) reports about Betelgeuse 'imminently' going supernova and has set up their own telescope plus live stream to monitor it, with a looping 'countdown' to keep people interested (for a short time). Or maybe some kind of money-raising scam, although it's hard to see how they'd make money out of this.

enter image description here

  • 14
    Best guess: just your typical clickbait youtube video that makes money through ads. Youtube hardly ever deletes misleading content (title) claims outside very narrow categories. Commented Aug 8, 2022 at 16:57
  • A good guess @Fizz. Last year I followed a youtuber claiming to give accurate data on that falling Chinese rocket. I think they had correct lat/long data (from NASA or some such), but their altitude data was made up. Set up so that it looked like it was decending a quarter mile per lap. But with the consequence that at the time of the reported splashdown they still showed the altitude to be about 100 miles :-) The worst part was that a local piece of yellow press was reporting the numbers from that feed religiously! Commented Aug 8, 2022 at 20:10
  • 2
    Is it actually a life stream, or just a looped video? Commented Aug 9, 2022 at 0:42
  • 5
    @PaŭloEbermann Since it's been running for over a day now. The rotation of the Earth would have taken it over the horizon by now. It's a looped video.
    – Schwern
    Commented Aug 9, 2022 at 1:08

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .