Imagine if the Sun suddenly turned into a black hole—sounds wild, right? First off, Earth wouldn’t get sucked in like in the movies because the Sun’s mass wouldn’t change, so our orbit would stay the same. But things would get really dark and cold, fast. Without sunlight, all plants would die, and the temperature would drop drastically, making life nearly impossible. We’d see the Sun shrink to a tiny point, but its powerful gravity would remain. Animation is created by Bright Side. ---------------------------------------------------------------------------------------- Music from TheSoul Sound: https://thesoul-sound.com/ Check our Bright Side podcast on Spotify and leave a positive review! https://open.spotify.com/show/0hUkPxD34jRLrMrJux4VxV Subscribe to Bright Side: https://goo.gl/rQTJZz ---------------------------------------------------------------------------------------- Our Social Media: Facebook: https://www.facebook.com/brightside Instagram: https://www.instagram.com/brightside.official TikTok: https://www.tiktok.com/@brightside.official?lang=en Stock materials (photos, footages and other): https://www.depositphotos.com https://www.shutterstock.com https://www.eastnews.ru ---------------------------------------------------------------------------------------- For more videos and articles visit: http://www.brightside.me ---------------------------------------------------------------------------------------- This video is made for entertainment purposes. We do not make any warranties about the completeness, safety and reliability. Any action you take upon the information in this video is strictly at your own risk, and we will not be liable for any damages or losses. It is the viewer's responsibility to use judgement, care and precaution if you plan to replicate.
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00:00Well, it turns out black holes might not be as elusive as we once thought.
00:05They might be hiding within stars.
00:07In this case, the extra mass of some of these space lanterns could explain weird gravitational
00:13effects in the Universe.
00:15Previously, dark matter was the cause of these phenomena.
00:18The black holes I'm talking about might be those itty-bitty ones that appeared at
00:23the dawn of time when the Universe was just a baby.
00:27And they may still be lurking in the hearts of giant stars.
00:30A team of scientists say the idea might be quite plausible.
00:35Astronomers could detect such trapped black holes by the vibrations they produce on their
00:39star's surfaces.
00:41And if there are many of them out there in the cosmos, they might function as the very
00:45dark matter that holds the Universe together.
00:50Almost any black hole was once a massive star that collapsed in on itself and became incredibly
00:55dense.
00:56Black holes have immense gravitational pull.
00:59Even light can't escape their clutches.
01:01People often think that black holes work like vacuums, pulling space inside.
01:07But that's not the case.
01:08Black holes can only swallow stuff that is extremely close, usually space objects venturing
01:14into their event horizon.
01:15That's a black hole's point of no return.
01:18Once you cross this border, there's no escape.
01:22In 1971, renowned physicist Stephen Hawking suggested another origin of black holes.
01:29If we took the thick soup of particles that appeared moments after the Big Bang and the
01:33birth of the Universe, we'd be bound to find some spots dense enough to collapse and
01:39create black holes.
01:41Such holes, which got the name of primordial black holes, could range in size from microscopic
01:46to gigantic.
01:48If they were pervasive and numerous enough, primordial black holes could act as dark matter,
01:54knitting the cosmos together with their enormous gravity.
01:58And dark matter is believed to make up 85% of all the matter in the Universe.
02:03So what's the matter?
02:06Astronomers have been searching for primordial holes by looking for flashes that would occur
02:10when they pass in front of distant bright objects, magnifying their light like a lens.
02:16But they haven't spotted even one yet.
02:18On the other hand, if a primordial black hole was tiny enough, with a mass like that
02:23of an asteroid, and a diameter as minuscule as a hydrogen atom, the flashes wouldn't
02:28be bright enough to be detected by such surveys.
02:32Then the team, researching the phenomenon of primordial black holes, decided to consider
02:37the consequences of a Universe where dark matter was made entirely out of tiny black
02:42holes.
02:43They concluded that one of such teensy holes could be dashing through the Solar System
02:48at any given time.
02:50Some might occasionally get trapped within gas clouds, giving birth to new stars, ending
02:54up in their centers.
02:56The next step of the researchers was to build a model of a black hole existing in the very
03:01core of a star, where hydrogen atoms undergo fusion and produce light and heat.
03:07At first, they didn't see anything unusual.
03:09Even a super-dense stellar core is mostly empty space, and it wouldn't be easy for
03:14a microscopic black hole to find matter to consume there.
03:18That's why its growth would be incredibly slow.
03:21It could take longer than the lifetime of the Universe for this tiny hole to eat a star.
03:28But what if a larger hole, as massive as the dwarf planet Pluto or asteroid Ceres, appeared
03:34at the center of a star?
03:36Then it would get bigger in a matter of a few hundred million years.
03:40The material would keep spiraling into the black hole, creating a disk that would heat
03:44up because of friction emitting radiation.
03:47Once the black hole grew to the size of Earth, it would start emitting even more radiation,
03:53shining extremely brightly.
03:55It would also be churning up the star's core, and the star itself would turn into
03:59a black hole-powered rather than a fusion-powered object.
04:03Such entities were dubbed Hawking stars.
04:07To cool off, the exterior of a Hawking star would form a red giant.
04:12That's what our Sun is likely to turn into as it gets older.
04:16But a red giant star with a primordial black hole at its center would be cooler than the
04:21stars that have reached this stage through regular means.
04:24Such stars are known as red stragglers.
04:29To find out whether they indeed host a black hole, astronomers might need to tune to the
04:34frequencies at which stars vibrate.
04:37Since a Hawking star would mostly affect the interior of the star rather than its topmost
04:41layers, the star would thrum with a certain combination of frequencies.
04:46The waves created in the process could be detected in a way the star's light would
04:51pulse and thrum.
04:52So all scientists need to do now is study the already known red stragglers and figure
04:58out whether any of them show the characteristic vibrations of a black hole.
05:03Should we worry about the Sun?
05:05Since our star hasn't reached its red giant stage yet, we can't know whether it'll
05:10turn into a cool red straggler.
05:13What we know, though, is that our star might contain those tiny black holes that formed
05:17in the Big Bang.
05:19But now, we have no means to check whether they're indeed there.
05:24Currently, our star is around the midpoint of its existence.
05:29Middle age.
05:31It creates energy non-stop by fusing hydrogen atoms within its core.
05:36Once it runs out of hydrogen in its core, it will enter its red giant phase and begin
05:41to collapse.
05:42It'll happen in about 5 billion years, don't hold your breath, and the phase itself will
05:47last for a billion years or so before our star depletes its fusible materials and loses
05:52its outer layers.
05:54It will leave behind a tiny white dwarf star half as massive as the Sun and around the
05:59size of our planet.
06:01In some cases, when the gravitational collapse of a star's core is complete, the star remnants
06:07turn into a black hole.
06:09But that's not the fate awaiting our Sun.
06:11You see, our star just doesn't have what it takes to become a black hole.
06:16It's not heavy enough.
06:18There are a few conditions that can affect whether a star can turn into a black hole,
06:23including its composition, rotation, and the processes that lead to its evolution.
06:28But the main requirement is still the right mass.
06:32Stars with 20 to 25 times the mass of the Sun can potentially experience the gravitational
06:38collapse needed to form black holes.
06:41In other words, the Sun is simply too small to form a black hole.
06:45But what would happen to us if it did?
06:49You might assume that if the Sun turned into a black hole, our planet would be doomed to
06:54be pulled into it.
06:56But do you remember the basics?
06:58Black holes aren't giant space vacuum cleaners, just sitting there and waiting for a new planet
07:02or star to get their hands on.
07:06But black holes don't have enough gravitational force beyond that created by their incredible
07:11mass.
07:12And if the Sun were to turn into a black hole, which will not happen, this hole would still
07:17have the same mass as our former star.
07:20And Earth's orbit around this newly formed black hole wouldn't change.
07:24But all other things would change dramatically.
07:27The Sun, which is currently around 432,000 miles in radius, would shrink to a mere 1.9
07:34miles in radius.
07:36But you wouldn't be concerned with the absence of the bright yellow sphere in the sky, since
07:40you have many more pressing issues on your hands.
07:43Our planet's main heat source would be gone, leaving us frozen in the dark.
07:48Without this source of energy, photosynthesis would immediately stop, disrupting entire
07:53food chains.
07:54Eventually, all life on Earth would be extinguished.
07:58But rest assured, our hard, barren rock of a planet would continue in its orbit.
08:03Oh well…
08:04That's it for today, so hey, if you pacified your curiosity, then give the video a like
08:10and share it with your friends!
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