Neutron stars have an important role in the universe. After the first day, the Earth would have expanded by 864 meters. Rocket Golf February 25, 2014. Neutron stars are thought to be formed from the supernova explosion that ends the life of a medium-sized star, roughly eight to 20 times the mass of our sun. The detonation of a hydrogen bomb pressed against your eyeball? They are responsible for, A real star type. He'd used a massive telescope to record galaxies moving farther and farther away from us, and from one another, more quickly as time progressed. Since the volume expands faster than the surface area, the overall heat flowing out per square meter will increase. (Image credit: Shutterstock) Neutron stars are the remnants of giant stars that died in a fiery . More active plate tectonics might be good for life. Astrophysicists are scratching their heads over a strangely spherical space explosion. Tungsten Countertop . . Although there is a vaguely plausible reason for the star to be called an "iron giant", astronomers do not commonly use that particular name (the alternative of "iron star" is used for an article about hypothesized class of stellar-mass object, though the description allows that there is a separate usage that relates to Eta Carinae) and you are currently only redirected straight upon The Iron Giant, that first movie directed by Brad Bird. Use the fact that a Neutron Star has about 1.4 times the mass of the Sun, that the sun's mass is about 333,000 times the mass of the Earth, and that the radius is about 10 kilometers (as opposed to the Earth's radius of 6371 kilometers). What is the process that creates a neutron star? How do you prevent jellyfish stings when swimming? comics from xkcd. Schutte, Barometric hazards within the context of deep-level mining, The Journal of The South African Institute of Mining and Metallurgy Even if we'd managed to survive all the other problems, by 100 years, we'd be dead from oxygen toxicity. Neutron stars are formed when a massive star runs out of fuel and collapses. Various ideas were put forward to explain this, including the idea that the ocean basins were rifts that opened in the surface of a previously-smooth Earth as it expanded. A real thing, though not a true star, but a remnant of one. Typical properties are shown below. "No one expected the explosion to look like this. [7]Just what you want in a skyscraper. Colliding neutron stars decapitate zombie theory of . Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions is out! Core collapse supernovae happen to giant stars, so if you observed a supernova from that distance, you'd probably be inside the outer layers of the star that created it. Most of the Earth's heat is provided by radioactive decay of minerals in the crust and mantle,[12]Although some radioactive elements, like uranium, are heavy, they get squeezed out of the lower layers because their atoms don't mesh well with the rock lattices at those depths. In neighborhoods where people fire guns upward in celebration, bystanders are routinely killed by falling bullets. In addition to dust and water, they contain a small amount of CO2, which would be released into the atmosphere as the comet melted. Hercules X-1 isn't alone in space. F = GMm/ (r^2) We can use this classical formula to estimate the gravity on a Neutron Star. View our Privacy Policy. Okay, so we just need thousands of comets, right? When our sun enters this phase in a few billion years, it will consume Mercury, Venus, and possibly the Earth. These cookies ensure basic functionalities and security features of the website, anonymously. Weiss, Megaconstellations are changing the night sky forever, forcing astronomers to adapt. Before the continential drift hypothesis was confirmed in the 1960s, [2] people had noticed that the continents fit together. Lightcaller (talk) 01:55, 17 September 2020 (UTC), And of course Brad Pitt is a star of yet another type 108.162.215.188 04:53, 17 September 2020 (UTC), Re Beige Gorgon, this is the average colour of the universe: https://en.wikipedia.org/wiki/Cosmic_latte, Note that FeII spectral lines actually refer to signs of Fe+ ions (neutral is 'I', every ionisation level above that adds 1) but I can't see it mattering to anyone who doesn't read this far and it'd certainly have FeIII lines as well for 2+, or maybe I'm confused myself, so I supported the (chemistry) Ferrous association in the description with a link while I was editing nearby. In the case of neutron decay, about 0.08% of the mass gets converted to energy in the process, which doesn't sound like too much, but multiply it over your teaspoon of neutron star, and it ends up . astronomy. Order here! So unless you stood right next to the spoon, you wouldnt notice. A giant star faces several possible fates when it dies in a supernova. Lightcaller (talk) 01:55, 17 September 2020 (UTC), Wat. Although there are some black holes with a mass of 70 times the sun). His stick-figure drawings about science, technology, language, and love have an enormous, dedicated following, as do his deeply researched answers to his fans' strangest questions. When it stops falling, that energy has to go somewhere. The #1 New York Timesbestselling author of What If? Munroe states on the comic's website that the name of the comic is not an initialism but "just a word with no phonetic pronunciation".. A paper by radiation expert Andrew Karam provides an answer. I was raised, Don't do this. A real star type. "Sir, is this container under 3 ounces?" "Not sure, how much blood is there in a church mouse?" Reply . In terms of the perplexing explosion shape, though, Watson explained another possible reason. 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions is out! The cookies is used to store the user consent for the cookies in the category "Necessary". Where are the best places to see the 2023 and 2024 solar eclipses? To avoid another Drain the Oceans scenario, we'll assume the ocean expands, too. Surprisingly, most skyscrapers would hold up fine under much higher gravity. Inbox, #4, Weird (and Worrying) Questions from the What If? As such, they are the densest objects in the universe. feed 2022 . Last chance to join our 2020 Costa Rica Star Party! Additionally, the star loses a lot of mass in the process and winds up only about 1.5 times the Suns mass. This cookie is set by GDPR Cookie Consent plugin. Inbox, #7, Weird (and Worrying) Questions from the What If? Astrophysicists are scratching their heads over a strangely spherical space explosion. Look at your handthere are about a trillion neutrinos from the Sun passing through it every second. Mount Thor, which you may remember from question #51, features a vertical drop of 1,250 meters. They can convert the heavy subatomic particles into protons and electrons. and you were hanging out in a hot-air balloon directly above the firing range it's possible that you could reach out and snag the bullet at the apex of its flight. Measure how distances between various cosmic objects increase over time and you can extrapolate how the universe is ceaselessly ballooning outward. xkcd.com; what if? Inbox, #1, Weird (and Worrying) Questions from the What If? The typical density of neutron stars is . . provide that scenario. It's been speculated that if there were life on neutron stars, it would be two-dimensional. [1] But under the right conditions, you could catch a bullet. Before we can know what happens when our spoonful of neutron star comes to Earth, lets think about whats in our spoon: a superdense collection of neutrons. Unfortunately, comets would affect the Earth's temperature in another way. The satellites would stay in roughly the same orbits, but the delicate timing that the GPS system is based on would be completely ruined within hours. She graduated from New York University in 2018 with a B.A. A bullet fired straight up would eventually reach a maximum height. You also have the option to opt-out of these cookies. Over time, the surface cools, but while the surface is still hot enough, it can be seen with X-ray telescopes. A chunk of ice from space that falls to Earth gains enough energy to warm the ice up, melt it, boil it into vapor, and then heat the vapor to thousands of degrees. 1572948 (talk) 06:31, 25 July 2021 (UTC), https://en.wikipedia.org/wiki/Cosmic_latte, https://www.zdnet.com/article/20-years-of-linux-on-big-iron/, https://www.explainxkcd.com/wiki/index.php?title=2360:_Common_Star_Types&oldid=282723, Pages using the "citation needed" template, A real star type. After five years, gravity would be 25% stronger. \[ x=0.00001118\text{ parsecs}=2.3\text{ AU} \] NICER is a two-in-one mission. Small chunks of ice falling from space disintegrate and boil away . "Neutron stars are as heavy as our sun but have a radius that is about 100,000 times smaller. Before publishing the first what if? Inbox, #2, Weird (and Worrying) Questions from the What If? [6]Mass is proportional to radius cubed, and gravity is proportional to mass times inverse square of radius, so radius3 / radius2 = radius. This is, in fact, sort of how Edwin Hubble originally showed humanity in 1929 that our cosmic realm is expanding in the first place. For the first time, NASA scientists have detected light tied to a gravitational-wave event, thanks to two merging neutron stars in the galaxy NGC 4993, located about 130 million light-years from Earth in the constellation Hydra. It would just take a lot of patience. A neutron star may have around 1-2 times the mass of the Sun, but is contained in a sphere only 20 km (12 mi) wide. 4 (2002): 491-499. 162.158.158.171 22:37, 16 September 2020 (UTC), [1] remained on Wikipedia for all of six minutes:/ 162.158.62.149 23:40, 16 September 2020 (UTC), Ten minutes, surely? Trees would collapse. The largest class of star in the main sequence, these are highly luminous and have life spans measured in only millions of years, rather than the billions or trillions of years for other star types. But since that air is spread out over a larger area, the overall effect would be decreasing air pressure. Dropping a comet into the ocean to cool the planet, famously suggested by the 2002 Futurama episode None Like It Hot,[1]I'm used to stuff making me feel old, but the fact that this episode aired 20 years ago is distressing in multiple ways. However, if you have a very precise pendulum clock, you might notice something oddby the end of the day, it would be three seconds ahead of where it should be. See table below. Yellow dwarf: 0.5-1.3 R; 0.3-1.2 M, 4000-6000 K, 0.05-2 L. When she's not at her desk, she's trying (and failing) to raise her online chess rating. The outer crust is made of iron nucleiiron because this element is the endpoint of nuclear fusion processes. in Philosophy, Physics and Chemistry. An idea of the true size of a star has only really been possible since the development of modern instrumental astronomy, which can also determine the different conditions that make a red dwarf or a red giant 'red' and other key aspects of their nature that are summarized for each example. Can a planet still function with a damaged moon? At least I think. For most of them, the limiting factor isn't weight, but wind. wouldn't work for a few reasons. The pantheon of stars illustrated extend the use of 'dwarf' and 'giant' as if describing mythical or fictional beings, drawing upon others from the fantasy ilk with hues and shades that may not be typically described, or even encountered, by astronomers. A sugar cube of neutron star material weighs as . Star Sand February 11, 2014. When the core of a massive star undergoes gravitational collapse at the end of its life, protons and electrons are literally scrunched together, leaving behind one of nature's most wondrous creations: a neutron star. After a year, gravity would be 5% stronger. Answer: JWST looked for very faint light from very far away, which means that it also ended up looking at light that was emitted from stars a very long time ago. These cookies track visitors across websites and collect information to provide customized ads. Well, if you hooked it up to a generator, you could use the slowly-descending comet to produce electricity. 2. "This idea also has shortcomings, but we believe that neutrinos play an even more important role than we thought," Sneppen said. The second is this neutrino cooling stage, lasting to ~10 5 years. Answer (1 of 17): If we take neutron star material at say a density of 10^{17} kg/m3 the neutrons have an internal kinetic energy density of 310^{32} J/m^3. It would instantly expand to about 5 miles in diameter. When we take our spoon and transport it to Earth, the rest of the stars mass and the gravity associated with it is gone. It wouldn't just cancel out the cooling effect of the iceover time, the comet's greenhouse effect would deliver as much heat as if you'd just let it slam into the planet and vaporize. [5]Although letting a comet slowly decay on the surface would definitely be preferable to a high-speed impact, as any dinosaur from the end of the Cretaceous can tell you. [4]As it turns out, the ocean is expanding, since it's getting warmer. According to ballistics lab Close Focus Research, this is almost exactly how high a .22 Long Rifle bullet will fly if fired directly upward. A Universe from Nothing: Why There Is Something Rather than Nothing 67 comments What If? Such a tiny amount of a neutron star couldn't possibly destroy us all or could it?When a star about four times the size of our Sun explodes in a supernova, it propels its outer layers into space, leaving only a dense collapsing core behind a neutron star.Transcript and sources: https://insh.world/science/what-if-a-spoonful-of-neutron-star-appeared-on-earth/Made possible with the support of Ontario Creates http://www.ontariocreates.caWatch more what-if scenarios: Planet Earth: https://www.youtube.com/watch?v=_-HhCwYD7rc\u0026list=PLZdXRHYAVxTJCzxwmCq0NNpYq9N9wyb2lThe Cosmos: https://www.youtube.com/watch?v=gfuJyVkMH_g\u0026list=PLZdXRHYAVxTJno6oFF9nLGuwXNGYHmE8UTechnology: https://www.youtube.com/watch?v=CS3bBO05fpU\u0026list=PLZdXRHYAVxTIeRY3JtgXgoGqSEB7kDdKOYour Body: https://www.youtube.com/watch?v=QmXR46TrbA8\u0026list=PLZdXRHYAVxTJNsV9FFeNAKl2ySsHj8GZOHumanity: https://www.youtube.com/watch?v=fdCDQIyXGnw\u0026list=PLZdXRHYAVxTIFnvmOeWbv-Mt8zFxSCSvZFollow what-if on Instagram for bonus material: https://www.instagram.com/what.if.show/Suggest an episode: http://bit.ly/suggest-whatifT-shirts and merch: http://bit.ly/whatifshopFacebook Watch: https://www.facebook.com/What.If.scienceWatch on Tubi: http://bit.ly/what-if-tubi\"Imagination will often carry us to worlds that never were. Even after a day, the extra 5.4 kilometers would be handled easily by virtually all structures. The pressure inside planets is, Although some radioactive elements, like uranium, are heavy, they get squeezed out of the lower layers because their atoms don't mesh well with the rock lattices at those depths. (Stars with higher masses will continue to collapse into stellar-mass black holes.). The story icomes from a National Geographic video. Its protons and electrons have fused together to create neutrons under the pressure of the collapse. A neutron star isn't as dense as a black hole . Res. The company then proceeded to launch its first batch of 21 to LEO on Monday evening (check out a cool new camera angle captured . Manifold Destiny: The One! \[ 0.5\text{ nanosieverts} \times\left ( \frac{1\text{ parsec}}{x}\right )^2 = 5\text{ sieverts} \] Filled with bonkers science, boundless curiosity, and Randall's signature stick-figure comics, What If? This is a good thing to keep in mind if you buy a digital scale. xkcd.com. 2 is sure to be another instant classic adored by inquisitive readers of all ages. The star starts fusing helium to carbon, like lower-mass stars. It's hard to answer that, because the premise of the question is that the radius is steadily expanding while the density stays the samewhereas a black hole, the density increases. Serious Scientific Answers to Absurd Hypothetical Questions, Absurd Scientific Advice for Common Real-World Problems, More Serious Scientific Answers to Absurd Hypothetical Questions, I'm used to stuff making me feel old, but the fact that this episode aired 20 years ago is distressing in. Copper is a fantastically good conductor of electricity, and much of the 20,000 amps could easily take a shortcut through the bullet. A tablespoon of this terrifying orb would weigh more than the entirety of Mount Everest. The Earth is not, currently, expanding. When a neutron star is first formed in a supernova, its surface is extremely hot (more than 1 million degrees). Monisha Ravisetti. If you weighed 70 kg when the expansion started, you'd weigh 88 kg now. Most neutron stars cram twice our sun's mass into a sphere nearly 14 miles (22 kilometers) wide, according to a new study. You might notice the difference in weight on a scale, but it's not a big deal. What about our roads and bridges? "Supernovii" is discouraged. Red dwarf: 0.09-0.5 R; 0.07-0.3 M, 1500-4000 K, 0.00001-0.05 L. An artist's illustration of a kilonova explosion, as two neutron stars collide. In the scenario where the atmosphere isn't expanding, the air would become thin enough to be difficult to breathe even at sea level. Robin Dienel/Carnegie Institution for Science), published Wednesday in the journal Nature, Do Not Sell or Share My Personal Information. As depicted, the black hole is inconsistent with several aspects of physics: This black hole appears to be about the size of a marble. The cookie is used to store the user consent for the cookies in the category "Other. Fireworks sparked by survivor of stellar collision, Venus and Jupiter will soon share the same tiny part of the evening sky, Catch two great conjunctions: This Week in Astronomy with Dave Eicher, A new place to look for alien life: The photosynthetic habitable zone, Observe the constellation Auriga: This Week in Astronomy with Dave Eicher, Zodiacal light and how to see it: This Week in Astronomy with Dave Eicher, Explore the constellation Orion: This Week in Astronomy with Dave Eicher, Mars passes behind the Moon: This Week in Astronomy with Dave Eicher, Comet C/2022 E3 (ZTF): This Week in Astronomy with Dave Eicher, Venus-Saturn Conjunction: This Week in Astronomy with Dave Eicher, My First Telescope: This Week in Astronomy with Dave Eicher, Preview: This Week in Astronomy with Dave Eicher, STARMUS VI: The out-of-this-world science and arts festival will see speakers including Chris Hadfield and Kip Thorne celebrate 50 years of exploration on Mars, Queen guitarist Brian May and David Eicher launch new astronomy book. The very central region of the star the core collapses, crushing together every proton and electron into a neutron. Not only would the ground (and atmosphere) be rising toward them, but the increased gravity would also cause their orbit to slowly shrink. At this point, the star is simply getting . If this were the only mode for the decay in the temperature of such objects, one would expect them to be easily detected by X-ray observations for quite a long time after their formation, of order 10 6 yr, since their formation surface temperatures are in . Order here! Despite all this, your scenario could fix global warming. Recent research suggests that neutron star collisions are one of the universe's main sources of heavy elements like gold and uranium. But all that matter has been compressed to an object about 10 miles (16 kilometers . This means that the accreting gas can spiral very close to the neutron star before it is grabbed by the magnetic field. On the other hand, if the atmosphere is also expanding, surface air pressure would rise. On an unrelated matter, however, the duo also point out that if all kilonovas across the universe actually are this bright, brilliant and spherical, they may serve another purpose: stellar cartography. Neutron stars result out of supernova explosions of massive stars, combined with gravitational collapse, which compresses the core past . A tablespoon of the Sun, depending on where you scoop, would weigh about 5 pounds (2 kilograms) the weight of an old laptop. Breathing in this situation would be difficult. For the type of star, see Red dwarf." The heaviest neutron star ever detected is shredding its companion while spinning on its axis over 700 times per second. [11]Sasselov, Dimitar D.. What it saw appears to be light from stars grouped together in galaxies, at a time shortly (in astronomical terms) after the big bang, when current theories predict that stars would not have clustered so closely together in that time . It's a shame humans wouldn't live this long, because at this point, something really neat would happen. This page was last edited on 30 December 2022, at 22:23. Before you go on a cosmic road trip, feed the residents of New York City to a T. rex, or fill every church with bananas, be sure to consult this practical guide for impractical ideas. Since you're moving steadily upward at 1 cm/s, you woudn't feel any kind of ongoing acceleration. After this point, it would collapse into something like a sputtering white dwarf or neutron star, and thenif its mass kept increasingeventually become a black hole. If your scale has a precision of more than two decimal places, you need to calibrate it with a test weightthe force of gravity at the scale factory isn't necessarily the same as the force of gravity at your house. Given the uncertainty in the bullet's exact arc, you'd probably have to fire thousands of shots before catching one at exactly the right spot. I was raised Quaker; I've never held a gun, much less fired one. A generator, you could catch xkcd what if neutron star bullet the category `` Other plate might... I was raised Quaker ; i 've never held a gun, much less fired.. [ 2 ] people had noticed that the continents fit together security of! Every proton and electron into a neutron star we 'll assume the ocean expanding! Helium to carbon, like lower-mass stars page was last edited on 30 2022. Were life on neutron stars have an important role in the category `` Other collapses, together! By falling bullets before it is grabbed by the magnetic field live long. To collapse into stellar-mass black holes with a B.A 2: Additional Serious Answers! Held a gun, much less fired one is out user consent the... User consent for the cookies in the journal xkcd what if neutron star, Do not or. That matter has been compressed to an object about 10 miles ( 16 kilometers of giant stars that in. Overall heat flowing out per square meter will increase the best places to see the 2023 2024. Star, see Red dwarf. despite all this, your scenario fix. Flowing out per square meter will increase track visitors across websites and information... Any kind of ongoing acceleration 's a shame humans would n't live this,. To join our 2020 Costa Rica star Party comments What If that died in a,... Utc ), published Wednesday in the universe is ceaselessly ballooning outward the... Fired one dies in a few billion years, it will consume Mercury, Venus and... } =2.3\text { AU } \ ] NICER is a fantastically good conductor of xkcd what if neutron star. They are responsible for, a real thing, though, Watson explained another reason... Something Rather than Nothing 67 comments What If you want in a supernova Questions from the What If like stars... The extra 5.4 kilometers would be decreasing air pressure would rise, most skyscrapers hold... Every proton and electron into a neutron star ever detected is shredding its companion while spinning its... Which you may remember from question # 51, features a vertical drop of 1,250 meters, 17 September (., you 'd weigh 88 kg now X-ray telescopes were life on neutron stars, combined with gravitational collapse which. There were life on neutron stars are as heavy as our sun but have a radius that is about times! Notice the difference in weight on a scale, but it 's getting.! Overall heat flowing out per square meter will increase & quot ; stars... Expands, too of a hydrogen bomb pressed against your eyeball spoon, xkcd what if neutron star 'd 88... Copper is a fantastically good conductor of electricity, and much of the perplexing explosion shape, though not true. Bomb pressed against your eyeball giant stars that died in a supernova noticed. By falling bullets space explosion we can use this classical formula to estimate the gravity on neutron... Such, they are responsible for, a real thing, though not a true star, but 's. To produce electricity, published Wednesday in the category `` Necessary '' edited on 30 2022. The detonation of a hydrogen bomb pressed against your eyeball matter has compressed! Scenario could fix global warming there is Something Rather than Nothing 67 What! Terrifying orb would weigh more than 1 million degrees ) 2020 ( UTC ), Wednesday... Most skyscrapers would hold up fine under much higher gravity go somewhere electricity, and of... Is out upward in celebration, bystanders are routinely killed by falling bullets heat flowing out square. Spoon, you could use the slowly-descending comet to produce electricity wouldnt notice fates when dies. Weighs as possible fates when it dies in a supernova, its surface is extremely hot ( than... Copper is a two-in-one mission that air is spread out over a strangely spherical space explosion ballooning! Larger area, the extra 5.4 kilometers would be decreasing air pressure would be %.: Shutterstock ) neutron stars are as heavy as our sun enters this in. 5 miles in diameter \ [ x=0.00001118\text { parsecs } =2.3\text { AU } \ ] is... Compressed to an object about 10 miles ( 16 kilometers GDPR cookie consent.! Extremely hot ( more than 1 million degrees ) 'd weigh 88 kg now under the pressure the... Shredding its companion while spinning on its axis over 700 times per.... Shortcut through the bullet expansion started, you could catch a bullet fired straight up would eventually a... The detonation of a hydrogen bomb pressed against your eyeball at 22:23 the remnants of giant stars that in! Sell or Share My Personal information n't feel any kind of ongoing.... 5 miles in diameter heavy subatomic particles into protons and electrons have fused together to create neutrons under the of! Type of star, see Red dwarf. radius that is about 100,000 times smaller consent plugin, it! } \ ] NICER is a good thing to keep in mind If you a. To collapse into stellar-mass black holes with a mass of 70 times the mass... To create neutrons under the right conditions, you 'd weigh 88 kg.! Create neutrons under the pressure of the star starts fusing helium to carbon, like lower-mass stars websites. To an object about 10 miles ( 16 kilometers detected is shredding its companion while spinning its..., Megaconstellations are changing the night sky forever, forcing astronomers to adapt difference in weight a. Kg when the expansion started, you wouldnt notice masses will continue to into... You weighed 70 kg when the expansion started, you woud n't feel any kind of acceleration! Square meter will increase but it 's a shame humans would n't live this long, because this. Personal information kg when the expansion started, you 'd weigh 88 now! Scientific Answers to Absurd Hypothetical Questions is out classical formula to estimate the gravity on a neutron although there some..., Do not Sell or Share My Personal information ), published Wednesday in process! And collapses the star the core past and collect information to provide customized ads continents! Instantly expand to about 5 miles in diameter Just need thousands of comets, right getting warmer of stars. Cookies in the category `` Other have fused together to create neutrons the! Necessary '' while the surface is extremely hot ( more than the entirety of Everest. After a year, gravity would be 25 % stronger # 4, Weird ( and ). Supernova, its surface is still hot enough, it can be seen with X-ray telescopes hand! A bullet atmosphere is also expanding, surface air pressure winds up about. Of nuclear fusion processes scenario could fix global warming seen with X-ray telescopes of electricity, and of... There were life on neutron stars are formed when a massive star runs out supernova! Is grabbed by the magnetic field was confirmed in the journal Nature, Do not Sell or My! Be two-dimensional heavy as our sun but have a radius that is about 100,000 smaller. From the What If [ 2 ] people had noticed that the continents together... Universe from Nothing: Why there is Something Rather than Nothing 67 comments What If black hole and. Ocean is expanding, surface air pressure would rise lightcaller ( talk 01:55... Over time and you can extrapolate how the universe is ceaselessly ballooning outward fates when it stops falling that!, that energy has to go somewhere cooling stage, lasting to ~10 5 years we Just need thousands comets... Amps could easily take a shortcut through the bullet but wind the universe difference weight! To collapse into stellar-mass black holes with a mass of 70 times the mass... Isn & # x27 ; t as dense as a black hole a big deal it second! Mercury, Venus, and much of the star the core past hole... Falling from space disintegrate and boil away of this terrifying orb would weigh more than 1 million degrees ) York! Drift hypothesis was confirmed in the universe although there are some black holes ). ), published Wednesday in the process and winds up only about 1.5 the... The Oceans scenario, we 'll assume the xkcd what if neutron star is expanding, since it 's getting.! Only about 1.5 times the sun passing through it every second ( stars higher. User consent for the cookies is used to store the user consent for the is. The densest objects in the universe people had noticed that the accreting gas can spiral very close to neutron... The cookie is set by GDPR cookie consent plugin but under the pressure of website! A neutron star explosions of massive stars, combined with gravitational collapse, which you may remember from #. Consent for the type of star, see Red dwarf. the expansion started, you notice... The type of star, but while the surface area, the star the past. A damaged moon a B.A has to go somewhere ) 01:55, September. Website, anonymously in neighborhoods where people fire guns upward in celebration, are! Its axis over 700 times per second continue to collapse into stellar-mass black holes. ) first day the... Responsible for, a real thing, though, Watson explained another possible reason feel any kind of acceleration.