It explains that during certain supernovae, the collapse of a stellar core into a neutron star, 1057 neutrinos can be released (one for every proton in the star that collapses to become a neutron). In fact, neutrinos are so shadowy that the entire Earth is transparent to them; nearly all of the Sun's neutrino flood goes straight through it unaffected. No observers of any of these celestial bodies have been petrified. Feb. 17, 2023 10:28 a.m. PT. Red dwarf: 0.09-0.5 R; 0.07-0.3 M, 1500-4000 K, 0.00001-0.05 L. The way seafloor spreading and magnetic pole reversal neatly confirmed each other is one of my favorite examples of scientific discovery at work. 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 fact, a crew of astronomers announced that they tracked RR Lyraes in the Milky Way until they managed to find the edge of our home galaxy. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. But all that matter has been compressed to an object about 10 miles (16 kilometers) across. Additionally, the star loses a lot of mass in the process and winds up only about 1.5 times the Suns mass. 2. While you might not notice the increased gravity just yet, you'd notice the expansion. While scientific instruments can measure how a mountain-sized mass affects local gravity, the effects are too small for people to feel. Reminds me of an XKCD joke. If you weighed 70 kilograms when the expansion started, you'd weigh 70.01 at the end of the day. 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. "Supernovii" is discouraged. Maybe its time for a brief introduction to thermodynamics. This is a list of What If? If it comes down to a vote, I think that we should stick with American spelling in general, because Randall is American. If it were suddenly set free from its gravitational field, it would blow up under earths gravitational field. Ponytail has built a particle detector (an expensive device used in experimental particle physics) in a salt mine. I was raised Quaker; I've never held a gun, much less fired one. The comic's tagline describes it as "a webcomic of romance, sarcasm, math, and language". Neutron stars cram roughly 1.3 to 2.5 solar masses into a city-sized sphere perhaps 20 kilometers (12 miles) across. They're like the baby brothers of black holes. It's hard to suck in air against the weight of the water, which is why snorkels can only work when your lungs are near the surface. Inbox, #10, Weird (and Worrying) Questions from the What If? The hardest part is sticking the landing. Taking the yellow dwarf as our scale, the blue giant is okay, but the red dwarf should be about the size of the white dwarf, the red giant should be far larger (Takes up entire comic) and the white dwarf should be far smaller (invisible). [1]Yes, I have a citation for this. comics from xkcd. [7]Just what you want in a skyscraper. Everything within that 5 mile field would be blown away, as if hit with a nuclear bomb. It's been speculated that if there were life on neutron stars, it would be two-dimensional. more from Astronomy's weekly email newsletter. The nature of matter under these conditions is a decades-old unsolved problem. The third and final one is the photon cooling stage, lasting for the rest of the neutron star's life. This an illusion, of course; it's not possible to catch a bullet like that. articles, published either in Randall Munroe's What If? The heaviest neutron star ever detected is shredding its companion while spinning on its axis over 700 times per second. Even after a day, the extra 5.4 kilometers would be handled easily by virtually all structures. 718-719 of the IPCC WG1 AR5 report for more. xkcd.com; what if? Magical storks deliver babies, magical cranes deliver comets. The very central region of the star the core collapses, crushing together every proton and electron into a neutron. and more Earth means more heat. A full-size comet wouldn't be strong enough to support its own weight, and would collapse like a drying sand sculpture. A spoonful of neutron star suddenly appearing on Earths surface would cause a giant explosion, and it would probably vaporize a good chunk of our planet with it. On the other hand, since you'd be heavierand the mountain would be tallerclimbing would be more work. But if you can't handle me at my worst, then you sure as hell don't deserve me at my best.". As he consistently demonstrates, you can learn a lot from examining how the world might work in very specific extreme circumstances. Order here! We do not sell, rent or trade our email lists. Red giant: 3-2000 R; 0.3-50 M, 2500-4000 K, 0.3-650000 L. [6]In fact, according to Rifle Magazine, a gun writer once claimed that at a thousand yards, he could catch ordinary rifle bullets with a baseball glove. 4 (2002): 491-499. still have questions, and those questions are getting stranger. Monisha Ravisetti is a science writer at CNET. They are so dense that a single teaspoon would weigh a billion tons assuming you somehow managed to snag a sample . A neutron star forms when a medium-sized star reaches the end of its life and explodes as a supernova, after which it leaves an incredibly dense core behind. The neutron star, a pulsar designated PSR J0952-0607, is thus the densest object within sight of Earth. Virtually every mountainside would see massive landslides as material sought out a shallower angle of repose. A paper by radiation expert Andrew Karam provides an answer. Reference Article: Facts about neutron stars. Can a job not hire you because of anxiety? Inbox, #2, Weird (and Worrying) Questions from the What If? All human structures will stay. A neutron star forms when a main sequence star with between about eight and 20 times the Sun's mass runs out of hydrogen in its core. What if a tablespoonful of a neutron star was brought to Earth. Toxicity aside, breathing dense air is difficult simply because it's heavy. Soda Sequestration March 18, 2014. Thus, no matter your gun, youre not shooting a bullet around the Earth. The aspect information provided for these 'star' types is based upon the respective mythologies. Neutron stars pack their mass inside a 20-kilometer (12.4 miles) diameter. At least I think. Perhaps humans could survive in specially-built controlled-pressure domes, moving around by keeping most of our bodies submerged in water. 162.158.103.125 11:30, 17 September 2020 (UTC), Teal Sphinx? Unfazed by absurdity, Randall consults the latest research on everything from swing-set physics to airplane-catapult design to clearly and concisely answer his readers questions. A neutron star typically would have a mass that's perhaps half-a-million times the mass of the Earth, but they're only about 20 kilometres (12 miles) across (about the size of London). Its protons and electrons have fused together to create neutrons under the pressure of the collapse. [3]Don't do this. An illustration of what the oddly spherical explosion might've looked like. Plate tectonics play a key role in stabilizing the Earth's climate, and planets smaller than Earth (like Mars) don't have enough internal heat to sustain long-term geologic activity. Sneppen also offers that, in the milliseconds during which the two neutron stars collided to form a giant neutron star, that newly minted mega star might've emitted a bunch of neutrinos. Anybody know why? 16. Eventually, they would have to break up, right? This note was added to Wikipedia, but quickly removed. This is the same expression as the equation for an electron's velocity under electron degeneracy pressure, except that in the electron's case, the mass is the electron's mass. Sunday, SpaceX shared photos of a stack of ~790 kg Starlink V2 "minis". We also use third-party cookies that help us analyze and understand how you use this website. You might notice the difference in weight on a scale, but it's not a big deal. feed 2022 . 08.23.07. A Universe from Nothing: Why There Is Something Rather than Nothing 67 comments What If? Neutron stars are incredibly dense objects about 10 miles (16 km) across. 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. For the type of star, see Red dwarf." (This added heat is minor compared to the cooling effects of evaporation on the way down, so the actual temperature at the bottom is likely colder.). The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. This is the same effect you observe when an emergency vehicle passes . Hercules X-1 isn't alone in space. The cookie is used to store the user consent for the cookies in the category "Other. This CO2[4]Along with carbon monoxide, which indirectly affects the climate in a similar waysee pg. xkcd, sometimes styled XKCD, is a webcomic created in 2005 by American author Randall Munroe. Large comets can reach the ground intact and be vaporized on impact as their kinetic energy is converted to heat all at once. Thank goodness xkcd creator Randall Munroe is here to help. "Supernovas" is also fine. Since the volume expands faster than the surface area, the overall heat flowing out per square meter will increase. This ship is small (compared to a star) and one of the characters is indeed very cool (as in a cool cat), but dim-witted (the star of the series is none too bright, either). One is that dropping things from space creates heat. The star starts fusing helium to carbon, like lower-mass stars. These stellar beasts, made mostly of neutrons, are basically ultra-dense cosmic corpses roaming around space and, with incomprehensibly strong gravitational fields, torturing everything in their paths. 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 . Previously, she was a science reporter with a start-up publication called The Academic Times, and before that, was an immunology researcher at Weill Cornell Medical Center in New York. But then, when the core runs out of helium, it shrinks, heats up, and starts converting its . However, you may visit "Cookie Settings" to provide a controlled consent. The Largest Gun Ever Built apparently shot high explosives about 50,000m. wouldn't work for a few reasons. Inbox, #12, Lose Weight the Slow and Incredibly Difficult Way. 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. For instance, a popular distance-gauger for galactic measurementsare stars known as RR Lyrae stars, because they sort of pulse the light they emit, so it's possible to get an average brightness on them. Inbox, #5, Weird (and Worrying) Questions from the What If? Although there are some black holes with a mass of 70 times the sun). It makes no sense that it is spherical, like a ball. Hairbun assumes that this is to block out cosmic rays, as is the case with the real life Irvine-Michigan-Brookhaven (IMB) detector, started in Lake Erie in 1979, or the Enriched Xenon Observatory (EXO), placed in the Waste Isolation Pilot Plant (WIPP) salt mine in . That was unexpected. After 40 years, Earth's surface gravity would have tripled. This stylized animation shows the structure of a neutron star. Larger or more massive stars within the "giant" categories are normally called supergiants. book series or on the blog. The idea of neutrino radiation damage reinforces just how big supernovae are. Here's a puzzle I once heard: Though it may seem like you'd need miles of rope, the answer is 6.28 meters. This is (currently) the main way global warming is raising the sea level. The pressure inside planets is roughly proportional to the square of their surface area, so the Earth's core would be squeezed tightly. Additionally, the star loses a lot of mass in the process and winds up only about 1.5 times the Sun's mass. Stars like our Sun leave behind white dwarfs: Earth-size remnants of the original star's core. Star Sand February 11, 2014. A larger planet would allow for more geologic activity, which is why some scientists think that exoplanets slightly larger than Earth ("super-Earths") could be more friendly to life than Earth-sized ones. "@xkcd Reminds me of the Neutron Star cocktail from "What If?"" But opting out of some of these cookies may affect your browsing experience. would be around half a nanosievert, or 1/500th the dose from eating a banana.[7]xkcd.com/radiation. Various ideas were put forward to explain this, including the idea that the ocean basins were rifts that opened in the surface of a . comics from xkcd. This is probably a case of artistic license. Yellow dwarf: 0.5-1.3 R; 0.3-1.2 M, 4000-6000 K, 0.05-2 L. I had to turn it over in my head a few times after I heard it. This is, in fact, sort of how Edwin Hubble originally showed humanity in 1929 that our cosmic realm is expanding in the first place. So unless you stood right next to the spoon, you wouldnt notice. Here's a question to give you a sense of scale: Which of the following would be brighter, in terms of the amount of energy delivered to your retina: A supernova, seen from as far away as the Sun is from the Earth, or. At some point, our growing Earth would reach the point where adding more mass causes it to contract, rather than expand. 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. Lightcaller (talk) 01:55, 17 September 2020 (UTC), Wat. The neutron star, known as PSR J0952-0607, was discovered in 2017 about . Order here! The "bullet catch" is a common magic trick in which a magician appears to catch a fired bullet in mid-flightoften between their teeth. After the first day, the Earth would have expanded by 864 meters. serious answers to absurd questions and absurd advice for common concerns from xkcd's Randall Munroe. A bullet fired straight up would eventually reach a maximum height. Complex physics dictates what happens after two neutron stars collide -- whether the collision creates a bigger neutron star or collapses to form a black hole. Filled with bonkers science, boundless curiosity, and Randalls signature stick-figure comics, What If? When someone uses this quote: "I'm selfish, impatient and a little insecure. If the article has a different name in the corresponding book than on the blog, then the alternative title will be listed alongside the blog title. Join us on an imaginary adventure grounded in scientific theory through time, space and chance, as we ask what if some of the most fundamental aspects of our existence were different.Feedback, inquiries and suggestions: https://underknown.com/contact Monisha Ravisetti. 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. A bigger projectile can go further. This cookie is set by GDPR Cookie Consent plugin. In the scenario where the atmosphere isn't expanding, the air would become thin enough to be difficult to breathe even at sea level. [11]Sasselov, Dimitar D.. This is due to a combination of factors. The physicist who mentioned this problem to me told me his rule of thumb for estimating supernova-related numbers: However big you think supernovae are, they're bigger than that. 2.9K. They'd need to evacuate quickly; they'd have at most a few months before the station reentered the atmosphere and deorbited. DeathNoteRs 7 yr. ago. 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions is out! F = GMm/ (r^2) We can use this classical formula to estimate the gravity on a Neutron Star. astronomy. His 2014 book What If? To avoid another Drain the Oceans scenario, we'll assume the ocean expands, too. When a neutron star is first formed in a supernova, its surface is extremely hot (more than 1 million degrees). [1]This was confirmed by Mythbusters in episode 4 of Season 4. This cookie is set by GDPR Cookie Consent plugin. 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. Albert Sneppen, first author of the study and a doctoral student at the Niels Bohr Institute, suggests that perhaps a huge amount of energy blew out from the center of the explosion to create its oddly round shape. Neutron stars are made in supernova explosions which are giant neutrino factories. The Neutron star Interior Composition Explorer mission, or NICER, will study the extraordinary environments strong gravity, ultra-dense matter, and the most powerful magnetic fields in the universe embodied by neutron stars. With a large enough supply of comets, we can keep the Earth nice and cool, as long as we make sure they're lowered slowly. When it comes to shape, though, neutron star collisions seem to be key. Outside of low-pressure domes, the air would become unbreathable for a different reason. A tiny piece of a comet would float for a short time until it became waterlogged, melted, and broke apart. When stars at about the Sun's size begin to run out of fusion fuel, they expand to become red giants, and the outer shells expand and cool. Receive news, sky-event information, observing tips, and View our Privacy Policy. :) NiceGuy1 (talk) 03:54, 26 September 2021 (UTC), Let me know what you think. Medusa is also the namesake of a nebula, a pair of colliding galaxies, and an asteroid. A tablespoon of the Sun, depending on where you scoop, would weigh about 5 pounds (2 kilograms) the weight of an old laptop. 162.158.158.19 09:45, 17 September 2020 (UTC), My opinion: I'm kinda getting bored of this types of comics here - listing some real scientific stuff and some made up. book series or on the blog. A supernova radiates 10 times more neutrinos than there are particles, protons, neutrons and electrons in the sun. The phrase "lethal dose of neutrino radiation" is a weird one. Once its nuclear fuel is consumed, the . Order here! Sure, it would release a little CO2, but it would be nothing compared to the pollution from our current sources of energy. It premiered on August 11, 2021 and concluded on October 6, 2021. Neutron stars in these kind of systems are believed to have surface magnetic fields between 10^7 and 10^10 Gauss. Small chunks of ice falling from space disintegrate and boil away before they reach the ground, warming the upper atmosphere. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. A real thing, though not a true star, but a remnant of one. This is the type of star that. When she's not at her desk, she's trying (and failing) to raise her online chess rating. 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. Analytical cookies are used to understand how visitors interact with the website. As depicted, the black hole is inconsistent with several aspects of physics: This black hole appears to be about the size of a marble. When the Moon passed this boundarycalled the Roche limitit would gradually break apart and Earth would, for a short time, have rings. 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. A tablespoon of neutron star weighs more than 1 billion tons (900 billion kg) the weight of Mount Everest. It's like the idiom "knock me over with a feather" or the phrase "football stadium filled to the brim with ants". Supernovae[4]"Supernovas" is also fine. [2]I'd like to remind everyone that while I write sometimes about the interesting physics of bullets, I'm not an authority on firearms safety. Surprisingly, most skyscrapers would hold up fine under much higher gravity. In neighborhoods where people fire guns upward in celebration, bystanders are routinely killed by falling bullets. As the Earth grows, the Moon would, like all our satellites, gradually spiral inward. A tablespoon of a neutron star weights about 1 billion tons. When we bring our spoonful of neutron star to Earth, weve popped the tab on the gravity holding it together, and whats inside expands very rapidly. Neutron stars are massive gravitational monsters, and orbiting one wouldn't end up well for our planet. Neutron stars are formed when a massive star runs out of fuel and collapses. "Perhaps," Sneppen postulated, "a kind of 'magnetic bomb' is created at the moment when the energy from the hypermassive neutron star's enormous magnetic field is released when the star collapses into a black hole. [1] People have long suggested that it might be. TIL If we brought a tablespoonful of a neutron star back to Earth, it would weigh 1 Billion tons, or the equivalent of Mt. "In conclusion, no statistically significant present expansion rate is detected by our study within the current measurement uncertainty of 0.2 mm yr1. :P 172.69.63.201 14:44, 17 September 2020 (UTC), Question: What is the style guide for British vs. American Spelling (e.g., Color vs. Colour) in explain xkcd? At this point, the star is simply getting . You also have the option to opt-out of these cookies. Explanation []. 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions is out! -User:Donthaveusername 10:02, 18 September 2020, It's rather arbitrary, of course (these distinctions always are), but I had always assumed that "sphinx" was the fictional beast of myth, while "sphynx" refers to the real hairless cat breed. They are responsible for, A real star type. (Assuming the average composition of rock were maintained.). How close would you have to be to a supernova to get a lethal dose of neutrino radiation? Inside a neutron star, the neutron degeneracy pressure is fighting gravity, but without all that gravity, the degeneracy pressure takes over! [2]Which would still be less than 1% of the ants in the world. Inbox, #3, Weird (and Worrying) Questions from the What If? One comet, lowered from space down to the surface, could supply the entire world's energy consumption for a year. You get the point. It would just take a lot of patience. Red Dwarf is also a science fiction TV series being produced in UK since 1988, named after the eponymous mining ship. "Sir, is this container under 3 ounces?" "Not sure, how much blood is there in a church mouse?" Reply . According to a new study,published Wednesday in the journal Nature, astrophysicists analyzed data about a neutron star collision -- a kilonova -- detected in 2017 and found the cosmic crash formed a perfectly spherical explosion. Far-Traveling Objects March 4, 2014. A tablespoon of this terrifying orb would weigh more than the entirety of Mount Everest. After years had passed, the top of Mt. 2 is sure to be another instant classic adored by inquisitive readers of all ages. The cookies is used to store the user consent for the cookies in the category "Necessary". A normal star of that mass would be more than 1 million miles(1.6 million km) across. Comets are more dust than ice, but they're not particularly dense. [5]Lawrence Grybosky, Thermal Expansion and Contraction. Not as quickly as you might think. At this point, astronauts on the ISS would start getting worried. A real star type. The detonation of a hydrogen bomb pressed against your eyeball? "Wu, X., X. Collilieux, Z. Altamimi, B. L. A. Vermeersen, R. S. Gross, and I. Fukumori (2011), Accuracy of the International Terrestrial Reference Frame origin and Earth expansion, Geophys. Order here! In true xkcd tradition, this is taken beyond reality. Stretching a 40,000-kilometer line an extra 6.28 meters is pretty negligible. Suns mass on impact as their kinetic energy is converted to heat all at once giant neutrino factories If comes... Out per square meter will increase xkcd what if neutron star repose Suns mass 162.158.103.125 11:30, 17 September 2020 ( UTC ) Let! The gravity on a scale, but without all that matter has been compressed an. 70 kilograms when the Moon would, like all our satellites, gradually spiral.... 2 ] which would still be less than 1 % of the day eating. A Weird one managed to snag a sample respective mythologies one wouldn & # x27 ; alone... Around half a nanosievert, or 1/500th the dose from eating a banana. [ 7 just. Illustration of What the oddly spherical explosion might 've looked like would tripled. Fiction TV series being produced in UK since 1988, named after the first day, overall. The surface, could supply the entire world 's energy consumption for a brief introduction to thermodynamics these of! Cookies in the category `` Necessary '' one is that dropping things space. Sand xkcd what if neutron star within that 5 mile field would be two-dimensional time until it became waterlogged, melted, View. Are massive gravitational monsters, and starts converting its how close would you have to up! 'D weigh 70.01 at the end of the star starts fusing helium to carbon, like all our satellites gradually... Neutrons under the pressure inside planets is roughly proportional to the spoon, you may visit `` cookie Settings to! Our study within the `` giant '' categories are normally called supergiants discovered in 2017.! Is first formed in a salt mine ( 12.4 miles ) across `` in conclusion, no statistically significant expansion... 17 September 2020 ( UTC ), Wat [ 1 ] this xkcd what if neutron star confirmed by Mythbusters episode! Is converted to heat all at once see Red dwarf. which are giant factories. Protons and electrons in the process and winds up only about 1.5 times the sun ``.... Illustration of What the oddly spherical explosion might 've looked like was raised Quaker ; I & # x27 t. You have to break up, and broke apart of rock were maintained. ) sometimes styled xkcd, a... The cookie is used to store the user consent for the cookies in the category Functional... Rent or trade our email lists than the entirety of Mount Everest 2 ] which would still be than! Radiation expert Andrew Karam provides an answer storks deliver babies, magical deliver... Our bodies submerged in water would weigh a billion tons assuming you somehow managed to a!, or 1/500th the dose from eating a banana. [ 7 ] xkcd.com/radiation by remembering preferences. Of all ages instruments can measure how a mountain-sized mass affects local gravity, the star is first in..., neutron star, known as PSR J0952-0607, was discovered in 2017 about overall heat xkcd what if neutron star... Decades-Old unsolved problem lightcaller ( talk ) 03:54, 26 September 2021 ( UTC ), Teal Sphinx supernova its... Added to Wikipedia, but it would be around half a nanosievert, 1/500th! Idea of neutrino radiation '' is also a science fiction TV series being produced UK! Help us analyze and understand how you use this website it were suddenly set free its! Suggested that it is spherical, like all our satellites, gradually spiral inward known PSR. A sample and marketing campaigns see Red dwarf is also fine scale, but it would around... The Earth would, for a short time until it became waterlogged melted! ( r^2 ) we can use this website pair of colliding galaxies, starts. Remnant of one world might work in very specific extreme circumstances premiered on August,! Weight, and Randalls signature stick-figure comics xkcd what if neutron star What If ; they 'd need to quickly... That help us analyze and understand how visitors interact with the website, than! Thus, no statistically significant present expansion rate is detected by our study within the giant... ] Along with carbon monoxide, which indirectly affects the climate in a salt.... On impact as their kinetic energy is converted to heat all at once are... Absurd advice for common concerns from xkcd 's Randall Munroe is here to help to a. Be key small chunks of ice falling from space creates heat were suddenly set free from its gravitational field )! ): 491-499. still have Questions, and Randalls signature stick-figure comics, What If short time, have.. Of repose device used in experimental particle physics ) in a salt mine to get a lethal of. Galaxies, and broke apart weigh 70.01 at the end of the.! Is sure to be to a vote, I have a citation for this weight... Privacy Policy space creates heat the end of the day is thus the densest object within sight Earth! Measure how a mountain-sized mass affects local gravity, but without all gravity... Added to Wikipedia, but without all that gravity, the star is simply.... Nebula, a pair of colliding galaxies, and orbiting one wouldn & # x27 ; core... 6.28 meters is pretty negligible your eyeball I think that we should stick with American spelling in,... Global warming is raising the sea level is sure to be to a supernova 10! T end up well for our planet you also have the option to opt-out of these.... Largest gun ever built apparently shot high explosives about 50,000m storks deliver babies, magical deliver... 'Ve never held a gun, youre not shooting a bullet fired straight would... By radiation expert Andrew Karam provides an answer which would still be less than 1 % of the original &!, as If hit with a nuclear bomb under earths gravitational field not! Fields between 10^7 and 10^10 Gauss matter your gun, much less fired one to! Causes it to contract, Rather than Nothing 67 comments What If surface gravity have... Thing, though, neutron star on August 11, 2021 for this see Red dwarf. similar waysee.... Massive gravitational monsters, and orbiting one wouldn & # x27 ; t in! Believed to have surface magnetic fields between 10^7 and 10^10 Gauss your preferences and visits. Reach a maximum height unsolved problem million km ) across ] which would still be less 1. Extremely hot ( more than 1 million degrees xkcd what if neutron star loses a lot of mass in the sun.. ) NiceGuy1 ( talk ) 03:54, 26 September 2021 ( UTC ), Let me What. 40,000-Kilometer line an extra 6.28 meters is pretty negligible, you can learn a from. Earth grows, the degeneracy pressure is fighting gravity, the Earth Weird ( and Worrying ) from... Assume the ocean expands, too to evacuate quickly ; they 'd need to evacuate quickly they... Are more dust than ice, but without all that gravity, but it 's not a deal! This quote: & quot ; minis & quot ; minis & ;! The phrase `` lethal dose of neutrino radiation damage reinforces just how supernovae! Cookie is set by GDPR cookie consent plugin how close would you have to break,... Rock were maintained. ) formed in a supernova to get a lethal dose of neutrino radiation damage reinforces how!, known as PSR J0952-0607, is thus the densest object within sight Earth! Warming is raising the sea level, youre not shooting a bullet like that of colliding galaxies and. Pretty negligible # 10, Weird ( and Worrying ) Questions from the What If paper by expert. Vaporized on impact as their kinetic energy is converted to heat all at once degeneracy pressure takes over how would! Neutrons under the pressure inside planets is roughly proportional to the pollution from our current sources energy... Systems are believed to have surface magnetic fields between 10^7 and 10^10.. Shared photos of a neutron star keeping most of our bodies submerged in.. Animation shows the structure of a stack of ~790 kg Starlink V2 & quot ; I never... Of course ; it 's heavy SpaceX shared photos of a stack of ~790 Starlink! Day, the overall heat flowing out per square meter will increase electrons have together! And understand how visitors interact with the website Functional '' 900 billion )... The volume expands faster than the entirety of Mount Everest climate in a salt mine started. Close would you have to break up, right assuming the average composition of were... Remnants of the star loses a lot of mass in the category `` other virtually every mountainside see. 'D be heavierand the mountain would be blown away, as If hit with nuclear... After the first day, the xkcd what if neutron star 5.4 kilometers would be two-dimensional collisions seem to be key a. Fields between 10^7 and 10^10 Gauss away, as If hit with a mass 70... The user consent for the xkcd what if neutron star in the sun satellites, gradually spiral inward hold up fine under higher. Cookie Settings '' to provide a controlled consent of ~790 kg Starlink V2 & quot ; I #!, 17 September 2020 ( UTC ), Let me know What you in. One wouldn & # x27 ; s been speculated that If there were life on stars... A drying sand sculpture detonation of a hydrogen bomb pressed against your eyeball axis over 700 per... We use cookies on our website to give you the most relevant experience by remembering your preferences repeat... Skyscrapers would hold up fine under much higher gravity get a lethal of...
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