just as habitable planets in the universe. probably only 10-15% are actual people that did a bit homework. the rest is just BSing around about what they saw in youtube video's :p
+JoshQuade Gaming - Animations, Gaming Videos What makes you think you're entitled to shut down people's comments, let alone why are you even acting like you're an astronomer?
Techi is that even proof that i go to them? no. Hypernova sounds like what an adult would say. Example, "VY Canis majoris will go HYPERNOVA in 100,000 years."
Scientists have said that the hyper nova created in the death of VY Canis majoris will be so huge that it will outshine the moon at night, and almost look as though the earth orbits two stars. Imagine if it were to leave a black hole, it would be "visible" from earth! (The best target for backyard astronomy ever)
Not always. Keep in mind that VY Canis majoris has a much larger schwarzschild radius than most stars, and black holes are not invisible. Sure we can't directly see them, but we can see the great black ball of where they are, not to mention a rapidly spinning accretion disk they create. Even if the the black hole itself wasn't visible from earth, the disk would be, and that's still pretty cool to look at.
+Ian Meade imagine how far vy canis majoris on earth....remember the light from the explosion of the star will see on earth on about months,years,or even century.
All I know, is when I start to actually think about the size of the universe and the number of systems, and stars within each system, I get a migraine and curl up into the fetal position realizing my insignificance in the universe.
Correction: Sun is white in colour, not yellow. We see it yellow due to earth's atmospheric layer. Go to moon, mars or Mercury which has very thin layer of atmosphere over it, it looks like very illuminus LED white bulb.
Ashutosh, why is the view of the Sun from alien worlds "the true color of the Sun" and the view of it in our natural environment not the true color in your point of view? I mean I really would like to know! Was this decided by some scientific committee, or the UN perhaps?
They call it yellow because it's black body radiation curve peaks in the yellow. Even the blue stars will still look white, they will just have more blue light then other colours if you look at the spectrum.
You know, just imagine living on a planet orbiting a star close to a hypernova-going star. You spend billions of years evolving just to have some fat-ass star several light years away wipe you out. Universe's just not fair.
a simple technique called spectroscopy, where we can read the spectrum of a star reveals something called absorption lines, these lines tell us what elements are common in any star that can be observed either by the naked eye, or by telescope, recent advances in this technique have allowed us, where we know planets exist around other stars, to separate out the spectrum of the planet from that of the parent star to assess the atmosphere of the orbiting planet.
It been years since I first saw this but it feels like it was just yesterday. Watching this video makes me feel nostalgic and old. That’s why I’m typing this comment on the day that this video became 10 years old.
AKA the The Alcubierre Drive. It takes advantage of a quirk in the cosmological code that allows for the expansion and contraction of space-time, and could allow for hyper-fast travel between interstellar destinations. Essentially, the empty space behind a starship would be made to expand rapidly, pushing the craft in a forward direction - passengers would perceive it as movement despite the complete lack of acceleration. For further information I suggest looking it up yourself.
Mass and volume are different matters. This means that VY Canis Majoris is much less dense than the sun. If they had equal density, then the mass and volume differences would be equal. The formula is mass = volume x density (you can use algebra to rearrange the variables as you see fit). I hope this clears up your confusion.
VY Canis Majoris is NOT the biggest star in Universe, Labia Majora is the Biggest Star....I know this as I go there twice a week and boy what fun it is...Believe you me.
I think that knowing more about the universe heightens our self-understanding. I do agree with you that they can't keep spending money like this, however if we didn't have these things we would never know how vast and complicated everything is. When we look at the odds of sophisticated life we find that the odds are astronomical, it is ironic that something so common is something so beautiful. When we start to value everything that we know nothing about then can we truly value our existence.
How do we know that it has not already exploded, given that it is 4600 light years away (and what we are observing today is how it used to be 4600 years ago)? Isn't it possible it already had the hypernova nearly 4600 years ago and therefore the gamma rays can hit the earth any moment? By the same vein, if a hypernova explosion happens in our galactic neighborhood, wouldn't it be that we can get almost no advance warning (other than that a star is ready to explode) before the stream of gamma rays suddenly hits the planet and wipes out all life?
+Jayakrishnan Nair Gamma Rays will travel at the speed of light, so if the Ray is infact pointed in our direction then yes we would get not advance warning. There is still some debate of the exact nature of this risk, if indeed there is risk at all. Piper
We won't need to worry about any other stars dying that'll wipe us out, because they're too far away. The only threat would be Gamma Ray Bursts, and the chance of the Gamma Rays actually hitting Earth are extremely slim.
The Sun's core is ~15,700,000K, it's photosphere(surface) is about 5,788K, and it's corona(atmosphere) is about 5,000,000K. As an astrophysicist, I say this on behalf of me, and all my colleagues; Please use Kelvins when talking about intense temperatures not found on Earth. The conversion from Celsius to Kelvin is really simple; K = °C + 273.15. So 0 °C = 273.15 Kelvin.
Whether a star goes nova or not , whether it leaves behind a black hole or neutron star depends on it's mass and metallicity(how much of the star is made up of heavier elements). For instance a star the size of CM could leave behind a neutron star if it's metallicity was very high. Current tables/models show Canis Majoris will leave behind a black hole after it's gravitational collapse.
Severi Jokinen The sun is classified as a G2 V type variant, meaning it's white star tinted yellow, its not as yellow as an F type and not as white as an A type star.
A wild VY Canis Majoris has spawned! Go Earth! VY Canis Majoris uses Hyper Nova!! It does not affect Earth! VY Canis Majoris has fainted and turned to a black hole! Earth fainted.
The reason for VY Canis Majoris's instability has to do with the complexity and rapidity of it's internal convection.Unlike red dwarves,which have the most simple and relatively slowest convection processes.And therefore the longest lifespans.Hypermassive stars like VY Canis Majoris have complex multiple layers of convection all ongoing simultaneously.And have cores that enter the helium burning phase most stars undergo at the end of their lifespan far earlier owing to their incredible mass and internal heat and pressure driving the conversion of hydrogen to helium phase.
It's classified as a yellow dwarf star. All because when you squint at it during the day and it looks like a bright white light, doesn't mean it's white.
MrHalo32009 No, the sun is yellow because the sky changes the wavelength of the sun's white light. If you were in orbit or on a body with no atmosphere you'd see the sun as white.
They would die before they get there. Sorry to burst your bubble. it is 4900 light years away. It takes us about 300 days to get something to mars; it's only 4 light minutes away.
Well, I've never been able to find anyone that agrees, some say that while others say slightly, I usually just pick the middle, but I appreciate your help here! :)
God created the universe, and he knows,more about the what why,and when's,.THESE years YOU people spend learning ABOUT things that are no way to be proven,they are just hypothetical speculation.
I was referring to the dislikes on the video. And yes sadly millions do still have a ridiculous belief in God. But that number is falling, thank god ;)
There's actually a GRB supposedly aimed right at us called WR104. However, most scientists think that due to how long it might take for it to actually cause it's GRB it will probably miss us.
@Tanmark1998 about the other part of the question... When 2 black holes colapse they definitely merge, make a lot of gamma-rays, and maybe even gravity wave (still has to be proven). I'm not sure about the explosion though.. but i think not.
There's no need to cuss and hate on each other. Yes this is exciting and mind-blowing. I find astronomy to be spiritual and empowering opening us up to the fact that we are truly insignificant on the grand scale of the cosmos.
The picture at the beggining wasnt the size of VY Canis Majoris, right now its the size of beyond Pluto's orbit. Like you said imagine it at its prime. Thats one huge Star.
Also about your thing with temperatures, I know that the Kelvin scale is like that. He talked about Celsius, which means I responded in Celsius. I didn't even think of Kelvin when typing that. *back to Betelgeuse and VY Canis Majoris* It honestly doesn't matter if they've already exploded or not. In a few more years, we'll have even more high quality observations of the stars, and we'll find out more accurately their sizes, more accurately each year. So sending a spacecraft wouldn't be an idea.
i believe that stars more than 50 solar masses, don't go away in supernovae, but in fact, they collapse directly into massive black holes (yes, just like that awesome Muse song). And that would abviously be the case of Canis Majoris.
Videos like this are fascinating but they end up making me sad because I am reminded that humanity will likely die out before we ever make contact with another species in the universe. Or even explore outside our solar system in person. There is so much to learn that we likely never will.
Betelgeuse is about 1/3 to 2/3 the diameter and about the same mass as VY Canis Majoris. It's not the second biggest star out there, but it is extremely similar to Canis Majoris in almost every way except size and color.
I used to not believe it, but based on actual data gathered from pictures of just supernova exploding in other galaxies, a hypernova in this galaxy the distance that this baby is would likely kill us. At the very least, it would mess up our ecosphere so badly, we would still die off.
Technically it Vy canis Majoris has shed over half of its original mass and size. NML Cygni is the Largest at the time but VY Canis Majoris Hold the spot for largest so far. Don't get me wrong There may have been others that were even more massive ,however, These were the ones in which we have discovered.
VY Canis Majoris is the biggest star known in the universe so far and has radius of 2.000 Suns so it would reach aprox. to the Saturns orbit. When it explodes, it creates supermassive black hole and would be visible on the night sky with the same brightness and size of a full Moon.
I'm pretty sure most of us understand the concept of light speed and distance. it's also an irrelevant because of the uncertainty. another way of saying what you said is: when we see it happen is exactly when we see it happen.
When you think of the fabric of space time you can imagine it as a 3d fabric. When a hole is cut out of it, it does make a sphere but it is also a hole.
A comment on the comment section. Do not confuse the term "mass of star" with "size of star". Blue Hypergiants and WR stars are massive, yes; but some Red Hypergiants have *HUGE* diameters.
+TheGodlessGuitarist Indeed, but the size of the star alone is beyond human comprehension. It is like 1 billion miles across. A super/hypernova of this magnitude will be one of the biggest explosions ever to have occurred in our universe.
There is a limit in how big stars can get. The larger a star, the more it damages it self, the shorter the life spawn of the star. If too much matter tries to cluster, it will implode under it's own weight, before it can become a stable star. But there are without a doubt larger stars then Canis Majoris out there.
Then he says "It could explode any minute", does he mean that it has already exploded and simply would appear to explode to us, or that it hasn't exploded yet and by the time the light reaches us, no one alive now would see it?
At the end of a stars life is when it runs out of fuel to burn, so then it collapses on itself, the larger the star, the harder it collapses and the more fusion/energy is created making a bigger explosion. That's why the biggest stars make the biggest explosions.
The problem is that the scientists have problems to define the surface of such stars. The density of this star is a thousand times less dense than the atmosphere on Earth. Because of the strong mass loss it is not sure if the outer layers of the star are still gravitationally bound to the star. So it´s very difficult to say it is exactly this large.
The sun emits white light. The yellow (and red) colors are because of the Earth atmosphere. Especially when the sun is low, it filters colors away (starting with blue).
the approximate diameter of vy canis majoris in miles is 8,000,000,000,000,000,000 or 8 quintillion miles in diameter which is larger than how far away it is (28.7 billion miles) when earth is only about 8000 miles in diameter, its a cool star compared to our sun, not as bright though, its amazing how small we are yet its only a hypergiant in the billions that are out there
@Tanmark1998 Yes, that's about right. Since our galaxy way created many black holes were created, especially at it's beginning. And many of them merged with each other and sunk in the middle of our galaxy because of that, and some other reasons we have a supermassive black hole in the center of our galaxy which is more than 5 million time more massive than our sun (black hole made from hypernova has around 1-5 soler masses).
Matter that falls into a black hole gets transported somewhere else since it literally rips the fabric of space and time. Matter isn't created nor destroyed.
THis is partly true. The sun emits most of its light in the green-yellow spectrum, thus if you were to put it on a spectrometer it would fit roughly into the yellow spectrum. However, it does emit all kinds of radiation at various wavelengths and at high power ratios, thus for all practucal purposes, it may as well be white.
Not all hypergiant stars automatically turn into a black hole. Some may become white dwarfs, others may be a neutron star, others could be a black hole or quasar. I does depend on mass, yet there are exceptions to some stars.
I have a question. Supernovas give birth to neutron stars and black holes correct? And the mass of the star determines whether or not the supernova results in a neutron star or a black hole correct? And VY Canis Majoris is in the top 3 largest known stars correct? If VY Canis Majoris is in fact NOT massive enough to spawn a black hole at its demise then what is? And have we ever seen the birth of a neutron star or black hole?
VY Canis Majoris is big but not really that massive. It has a very low density. UY Scuti is estimated at 1700 times bigger than the Sun by diameter but only 30 times heavier. There are stars out there 300x heavier than the Sun, but only 30 times bigger by diameter. Now that's an Ubernova I wanna see!
The thing that's really wierd to think about is that if VY went nova today, we wouldn't even know for another 4,900 years. Likewise, it could have gone nova 4,899 years ago and we wouldn't know untill next year. It could have gone nova when the pyramids were being built.
This is one of the biggest stars we know ...bettw , geuse , carina and vy canis ...i hope i live to see liest ome of them go !! .....unforgetable visual ! 👍👍🔭
This is true but keep in mind that the light astronomers are viewing of this star is from the year 2887BC. It is possible that this star already went supernova thousands of years ago, it might not even exist anymore and we still wouldn't know because we are viewing light from so long ago. Much of the stars and galaxies we view today are not how they really appear.
There's NML Cygni, WOH G64, VX Sagittarii, KW Sagittarii, KY Cygni, and last and smallest of these stars but bigger than VY Canis Majoris is Westerlund 1-26
R136a1, the primary, is the most massive star ever discovered. Most massive meaning it is the heaviest. VY Canis Majoris is the largest in terms of girth or diameter which is 2,100 solar radii. R136a1 is only 35.5 times as wide as the Sun while it may be 265 times as heavy. On the other hand, VY Canis Majoris is about 40 times as heavy as the Sun making the density of this star even thinner than that of the Earth's atmosphere...
