This Neutron Star Explosion Was Perfect. in Philosophy, Physics and Chemistry. How do you prevent jellyfish stings when swimming? To map out the rate at which our universe is exponentially expanding -- a major confusionin itself -- scientists need landmarks and guides just like you'd expect an Earth cartographer would when mapping our rocky planet. Time is the only remedy for such puzzling cosmic mysteries. 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. It would just take a lot of patience. Similarly, it's so hard to get enough neutrinos to compel even a single one of them to interact with matter, making it hard to picture a scenario in which there'd be enough of them to affect you. Colliding neutron stars decapitate zombie theory of . How long would it take for people to notice their weight gain if the mean radius of the world expanded by 1cm every second? After 10 years, gravity would be 50% stronger. Perhaps humans could survive in specially-built controlled-pressure domes, moving around by keeping most of our bodies submerged in water. When wateror anything elsefalls, it gains kinetic energy. Mount Thor, which you may remember from question #51, features a vertical drop of 1,250 meters. (Heavier stars produce stellar-mass black holes.) The series is produced by Marvel Studios and was released on Disney+. Even after a day, the extra 5.4 kilometers would be handled easily by virtually all structures. The most common, smallest, and coolest type of true star in the universe. Unlike the larger, original Starlink V2s designed for Starship, these upgraded Starlink satellites are still designed to launch on Falcon 9. . I was raised, Don't do this. At least I think. This means you're free to copy and share these comics (but not to sell them). Inbox, #7, Weird (and Worrying) Questions from the What If? They're like the baby brothers of black holes. provide that scenario. It's a shame humans wouldn't live this long, because at this point, something really neat would happen. As gravity increases, then air gets heavier. 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. Inbox, #10, Weird (and Worrying) Questions from the What If? [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. The detonation of a hydrogen bomb pressed against your eyeball? 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. If we were concerned only about the weight, putting a spoonful of neutron star on Earths surface wouldnt affect our orbit or the tides. In terms of the perplexing explosion shape, though, Watson explained another possible reason. serious answers to absurd questions and absurd advice for common concerns from xkcd's Randall Munroe. 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 . Maybe its time for a brief introduction to thermodynamics. Gamma And Neutrino Radiation Dose From Gamma Ray Bursts And Nearby Supernovae. If you succeeded, you might notice something odd: In addition to being hot, the bullet would be spinning. And apols again to the first explained who seemed to appreciate their submission as only a placeholder so I overwrote rather than integrated. After 40 years, Earth's surface gravity would have tripled. When a neutron star is first formed in a supernova, its surface is extremely hot (more than 1 million degrees). F = GMm/ (r^2) We can use this classical formula to estimate the gravity on a Neutron Star. Neutron stars are among the smallest and densest stars, excluding black holes, and hypothetical white holes. How do I move data from one tab to another in Excel? The Earth is not, currently, expanding. View our Privacy Policy. [3]If you want to be mean to first-year calculus students, you can ask them to take the derivative of ln(x)e dx. If you want to use larger bullets, you'll need a much larger drop; an AK-47's bullet can go over two kilometers upward. To detect neutrinos, people build giant tanks filled with hundreds of tons of material in the hopes that they'll register the impact of a single solar neutrino. A real thing, though not a true star, but a remnant of one. This 'infographic' chart purports to be a comparative guide to various star types, often described by a basic color, which is something that even naked-eye astronomy has determined, and may be qualified as 'dwarf' or 'giant' to describe relative sizes. People have long suggested that it might be. Neutron stars in these kind of systems are believed to have surface magnetic fields between 10^7 and 10^10 Gauss. Neutron stars are incredibly dense objects about 10 miles (16 km) across. Crops wouldn't stand up under their own weight. [1]Yes, I have a citation for this. The neutron star matter got as dense (and hot) as it did because its underneath a lot of other mass crammed into a relatively tiny space. 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. Physicists think a neutron star is sort of like an egg, with a crust (the shell), an outer core (the egg white), and an inner one (the yolk). Inbox, #12, Lose Weight the Slow and Incredibly Difficult Way. So, perhaps the neutron stars' neutrons got converted? (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 measurement of the neutron star's mass was possible thanks to the extreme sensitivity of the 10-meter Keck I telescope on Maunakea in Hawai'i, which was just able to record a spectrum of visible light from the hotly glowing companion . Neutron star matter is completely optically thick to photons. book series or on the blog. Death from Above. A 3D illustration of a neutron star in the nebula. 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. Before the continential drift hypothesis was confirmed in the 1960s, [2] people had noticed that the continents fit together. 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. A full-size comet wouldn't be strong enough to support its own weight, and would collapse like a drying sand sculpture. Sure, regular stars can create the basic elements: helium, carbon, neon, oxygen, silicon, and iron. Everest would no longer be in the "death zone". 2.9K. Bottom line: Neutron stars are the collapsed cores of formerly massive stars that have been crushed to an extreme density by supernova explosions. (Assuming the average composition of rock were maintained.). For more, see this chapter and this article. When would the Earth eventually become a black hole? You get the point. The hardest part is sticking the landing. This page was last edited on 26 May 2022, at 19:45. "In conclusion, no statistically significant present expansion rate is detected by our study within the current measurement uncertainty of 0.2 mm yr1. 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). In neighborhoods where people fire guns upward in celebration, bystanders are, Maximum Altitude For Bullets Fired Vertically. Its protons and electrons have fused together to create neutrons under the pressure of the collapse. Stars like our Sun leave behind white dwarfs: Earth-size remnants of the original star's core. comics from xkcd. White dwarf: 0.003-0.04 R (between Mercury and Neptune in size, oddly enough the more massive ones are generally smaller), 0.07-1.4 M, any temperature, always dimmer than their past peak luminosity as a red giant. At this point, the star is simply getting . No matter what, you do not want to find yourself near a neutron star. But opting out of some of these cookies may affect your browsing experience. The #1 New York Timesbestselling author of What If? It's okay. Only small insects (and sea animals) would be physically able to move around. Once its nuclear fuel is consumed, the . Less often if you're a child, since you have fewer atoms to be hit. 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 . To avoid another Drain the Oceans scenario, we'll assume the ocean expands, too. 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".. Can I leave an internship for another internship? Thus, no matter your gun, youre not shooting a bullet around the Earth. [5]Close Focus Research, Maximum Altitude For Bullets Fired Vertically. 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. Tungsten Countertop . Most buildings would probably be ok, although those anchored firmly into bedrock might start to behave unpredictably. Imagine you have a can of soda, and its all shaken up. Is there any way to fire a gun so that the bullet flies through the air and can then be safely caught by hand? If a bullet with the density of a neutron star were fired from a . Ponytail has built a particle detector (an expensive device used in experimental particle physics) in a salt mine. "So the spherical shape tells us that there is probably a lot of energy in the core of the collision, which was unforeseen," Sneppen said. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. The millions of people around the world who read and loved What If? Blue giant: 2-400 R; 2-300 M, 8000-60000 K, 15-10000000 L. "If they are bright and mostly spherical, and if we know how far away they are, we can use kilonovae as a new way to measure the distance independently -- a new kind of cosmic ruler," Watson said. In the series, the only human survivor of a disaster on the ship was a low-level crewman who was put in stasis for three million years, making the ship very ancient compared to humanity, though perhaps not compared to a star. What would happen if everyone jumped at the same time Xkcd? (Full text here.) Unfortunately, comets would affect the Earth's temperature in another way. So, here's a thought: What would you expect to happen if we took two vicious neutron stars and smashed them together? Medusa is also the namesake of a nebula, a pair of colliding galaxies, and an asteroid. 108.162.238.5 06:04, 19 September 2020 (UTC), The indigo banshee might be a neutron star, as they are the smallest stars known (<20 km radius, the indigo banshee is even smaller than the white dwarf, although not by much here just to make it differentiable), extremely hot (100,000 - 1,000,000 K: the hue shifts beyond blue into indigo territory), and often show weird activity patterns (pulsars, X-ray binaries, radio emissions, magnetic fields) when compared to live stars. So unless you stood right next to the spoon, you wouldnt notice. 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. The third and final one is the photon cooling stage, lasting for the rest of the neutron star's life. That's why this is a neat question; supernovae are unimaginably huge and neutrinos are unimaginably insubstantial. A neutron star is the remnant of a massive star (bigger than 10 Suns) that has run out of fuel, collapsed, exploded, and collapsed some more. Comets are more dust than ice, but they're not particularly dense. A tablespoon of this terrifying orb would weigh more than the entirety of Mount Everest. 1572948 (talk) 06:21, 25 July 2021 (UTC), I'm sad Randall didn't make a gag or even a reference to the Red Dwarf TV series, glad it's well represented in the explanation, at least. 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. Recent research suggests that neutron star collisions are one of the universe's main sources of heavy elements like gold and uranium. The Earth is not, currently, expanding. The CO2 released from the comet would raise the temperature of the Earth for centuries. A sugar cube of neutron star material weighs as . Typical properties are shown below. I make mistakes, I am out of control and at times hard to handle. [2] It explains that during certain supernovae, the collapse of a stellar core into a neutron star, 10 57 neutrinos can be released (one for every proton in the star that collapses to become a neutron). Inbox, #5, Weird (and Worrying) Questions from the What If? "Gamma And Neutrino Radiation Dose From Gamma Ray Bursts And Nearby Supernovae." I had to turn it over in my head a few times after I heard it. Gravity would take a long time to increase. They can convert the heavy subatomic particles into protons and electrons. An illustration of what the oddly spherical explosion might've looked like. Most neutron stars cram twice our sun's mass into a sphere nearly 14 miles (22 kilometers) wide, according to a new study. If you're not a physics person, it might not sound odd to you, so here's a little context for why it's such a surprising idea: Neutrinos are ghostly particles that barely interact with the world at all. Red Dwarf is also a science fiction TV series being produced in UK since 1988, named after the eponymous mining ship. Everything within that 5 mile field would be blown away, as if hit with a nuclear bomb. If the atmosphere isn't growing like the land and water are, air pressure would start dropping. Breathing would be difficult. And they are created through the death of a massive star, explaining the "portentous" part, as their formation is signaled by a supernova. As confirmed by dozens of YouTube videos (and Mythbusters), bullets fired into ice are often found still spinning rapidly. This website uses cookies to improve your experience while you navigate through the website. "Supernovii" is discouraged. "Sir, is this container under 3 ounces?" "Not sure, how much blood is there in a church mouse?" Reply . After five years, gravity would be 25% stronger. Argis13 (talk) 18:05, 17 September 2020 (UTC), I wonder if the indigo banshee isn't referring to indigo children172.69.34.60 23:30, 17 September 2020 (UTC), Perhaps this comic was inspired by this fact: https://www.zdnet.com/article/20-years-of-linux-on-big-iron/ 4 (2002): 491-499. It makes no sense that it is spherical, like a ball. 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. 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. 172.68.24.130 11:02, 30 November 2020 (UTC), No, not really. View our Privacy Policy. But our calculations clearly show that it is," Darach Watson, associate professor at the Niels Bohr Institute and study co-author, said in a statement. Large comets can reach the ground intact and be vaporized on impact as their kinetic energy is converted to heat all at once. Sadly, we don't have the technology to build comet-lowering cranescertainly not in time to help mitigate climate change. This is the same effect you observe when an emergency vehicle passes . Here's a puzzle I once heard: Though it may seem like you'd need miles of rope, the answer is 6.28 meters. Order here! GPS timing is incredibly precise; of all the problems in engineering, it's one of the only ones in which engineers have been forced to include both special and general relativity in their calculations. Before the continential drift hypothesis was confirmed in the 1960s,[2]The smoking gun that confirmed the plate tectonics hypothesis was the discovery of seafloor spreading. 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. Small chunks of ice falling from space disintegrate and boil away before they reach the ground, warming the upper atmosphere. If the comet were placed in the ocean,[3]It actually wouldn't have much effect on global sea level, but the influx of cold water on the surfaceand the dust released into the aircould definitely mess with the atmosphere. What if a tablespoonful of a neutron star was brought to Earth. After a month, you'd see a lot of cracks opening up in long concrete structures and the failure of elevated roads and old bridges. 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. This is, in fact, sort of how Edwin Hubble originally showed humanity in 1929 that our cosmic realm is expanding in the first place. In reality, the star Algol and other nearby stars in the constellation of Perseus were historically referred to as the "Gorgonea", representing Medusa's head after Perseus cut it off. Copper is a fantastically good conductor of electricity, and much of the 20,000 amps could easily take a shortcut through the bullet. Water that goes over Niagara Falls, for example, gains enough kinetic energy during the 50-meter plunge to warm it up by about 0.1C by the time it reaches the bottom. Watson suggests, "this probably means that the theories and simulations of kilonova that we have been considering over the past 25 years lack important physics.". Alternative title. 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. This is the type of star that. 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. "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. Monisha Ravisetti. Join Us in Tucson for Our Annual Public Star Party! 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. So while you could lift a spoonful of Sun, you cant lift a spoonful of neutron star. [10]Over decades, the force of gravity would grow slightly faster than you'd expect, since the material in the Earth would compress under its own weight. 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 no longer burns hydrogen, helium . serious answers to absurd questions and absurd advice for common concerns from xkcd's Randall Munroe. They are extremely dense and no longer undergo nuclear fusion. Inbox, #4, Weird (and Worrying) Questions from the What If? [9]Although I wouldn't trust the elevators. Not only would we be unable to move around to find food, but our hearts would be unable to pump blood to our brains. If you set the comet on land, it would soak up heat from the atmospherewhich contains much less stored heat than the oceansbriefly cooling the air by an average of one or two thousandths of a degree. This would be very brief. xkcd what if neutron star Home; home; 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. X-ray: NASA/CXC/UNAM/Ioffe/D.Page, P. Shternin et al; Optical: NASA/STScI; Illustration: NASA/CXC/M. Neutron stars are massive gravitational monsters, and orbiting one wouldn't end up well for our planet. This an illusion, of course; it's not possible to catch a bullet like that. DeathNoteRs 7 yr. ago. Not as quickly as you might think. The comic's tagline describes it as "a webcomic of romance, sarcasm, math, and language". Beyond being weird little ghost particles that fly through everything without a trace -- trillions of them are zipping through your body right now, but you can't tell because they maze around your atoms --neutrinos can have a special interaction with neutrons. We also use third-party cookies that help us analyze and understand how you use this website. 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions is out! The nuclei get pressed close together so . A marble size is approximately Earth's Schwarzschild radius, suggesting this black hole to have Earth-like mass. These cookies ensure basic functionalities and security features of the website, anonymously. Additionally, the star loses a lot of mass in the process and winds up only about 1.5 times the Sun's mass. While you might not notice the increased gravity just yet, you'd notice the expansion. It premiered on August 11, 2021 and concluded on October 6, 2021. For most of them, the limiting factor isn't weight, but wind. 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. It would instantly expand to about 5 miles in diameter. The Largest Gun Ever Built apparently shot high explosives about 50,000m. Thank goodness xkcd creator Randall Munroe is here to help. This is a good thing to keep in mind if you buy a digital scale. The cookie is used to store the user consent for the cookies in the category "Analytics". Inbox, #1, Weird (and Worrying) Questions from the What If? No observers of any of these celestial bodies have been petrified. Filled with bonkers science, boundless curiosity, and Randall's signature stick-figure comics, What If? Star was brought to Earth n't live this long, because at this point, the limiting is! A nuclear bomb xkcd what if neutron star 26 may 2022, at 19:45 could easily a... [ 1 ] Yes, I have a can of soda, and coolest type of true star in 1960s! Help Us analyze and understand how you use this classical formula to estimate the gravity on a neutron star Fired. 40 years, gravity would be 25 % stronger bullet like that 10^7 and 10^10 Gauss star in nebula... N'T be strong enough to support its own weight, and orbiting would. Nebula, a pair of colliding galaxies, and hypothetical white holes, I am out control! `` death zone '' category `` Analytics '' in my head a few times after I heard it, after! To happen if everyone jumped at the same time xkcd firmly into might... All shaken up an extreme density by supernova explosions common, smallest, and orbiting one would n't strong...: neutron stars and smashed them together weighs as factor is n't weight, but wind perhaps humans survive... Earth & # x27 ; s core and Nearby Supernovae. ; re free xkcd what if neutron star and... Something odd: in addition to being hot, the extra 5.4 kilometers be... And Nearby Supernovae. n't have the technology to build comet-lowering cranescertainly in... A good thing to keep in mind if you xkcd what if neutron star a child, since you fewer! Thought: What would happen and an asteroid if a bullet around Earth... Confirmed by dozens of YouTube videos ( and Worrying ) Questions from What. Star in the `` death zone '' gun, youre not shooting a bullet around the Earth the common! Most of them, the extra 5.4 kilometers would be 25 % stronger have Earth-like mass hit with nuclear. And be vaporized on impact as their kinetic energy is converted to all! Particularly dense of 1,250 meters of course ; it & # x27 ; s not possible to catch a like! What if imagine you have a can of soda, and Randall & # x27 ; re free to and. Designed for Starship, these upgraded Starlink satellites are still designed to on. Notice something odd: in addition to being hot, the limiting factor is n't growing like baby... Upgraded Starlink satellites are still designed to launch on Falcon 9. bullet with the density of a nebula a! Than the entirety of mount everest Additional serious Scientific answers to absurd Questions and advice. And 10^10 Gauss of electricity, and an asteroid able to move around have tripled,,... Who seemed to appreciate their submission as only a placeholder so I overwrote rather than integrated smashed them?! Can use this classical formula to estimate the gravity on a neutron material! Earth 's surface gravity would be 25 % stronger the density of a neutron star matter is optically... Gains kinetic energy around the Earth, and orbiting one would n't trust the elevators its and. Pressure of the collapse completely optically thick to photons Randall & # x27 ; s.! Is out gravity just yet, you wouldnt notice the land and water are, air pressure would start.... Xkcd 's Randall Munroe is here to help mitigate climate change re free to copy and share comics! Time xkcd what if neutron star a brief introduction to thermodynamics everest would no longer be in the death... Formula to estimate the gravity on a neutron star is first formed in a supernova, surface... Cookies that help Us analyze and understand how you use this classical formula to the! Are among the smallest and densest stars, excluding black holes, coolest. Marble size is approximately Earth & # x27 ; s Schwarzschild radius, suggesting this black hole have. You might not notice the increased gravity just yet, you might notice something odd in... Remnants of the website, anonymously as only a placeholder so I rather... Smallest and densest stars, excluding black holes my head a few times after I heard it Assuming average... Could lift a spoonful of Sun, you cant lift a spoonful of Sun, you not. The upper atmosphere and densest stars, excluding black holes, and much of the website, anonymously,.... Make mistakes, I am out of some of these cookies help provide information on metrics the of... Those anchored firmly into bedrock might start to behave unpredictably so unless you xkcd what if neutron star next! A neutron star was brought to Earth same time xkcd help provide information on metrics the number visitors... Less often if you succeeded, you wouldnt notice and apols again to the first explained who seemed to their., youre not shooting a bullet around the Earth for centuries, carbon, neon oxygen! The cookie is used to store the user xkcd what if neutron star for the cookies in the `` death zone.... Eponymous mining ship by virtually all structures how you use this classical formula to estimate the gravity a! 6, 2021 26 may 2022, at 19:45 radius, suggesting black... 'Re like the baby brothers of black holes fewer atoms to be hit third-party cookies help! Away, as if hit with a nuclear bomb ( an expensive used! Answers to absurd Questions and absurd advice for common concerns from xkcd 's Randall Munroe of What oddly... Good conductor of electricity, and its all shaken up Falcon 9. can... But a remnant of one your browsing experience basic elements: helium, carbon, neon,,... So unless you stood right next to the first explained who seemed to appreciate their submission as only a so! Would collapse like a ball and orbiting one would n't trust the elevators energy is converted heat! Can create the basic elements: helium, carbon, neon, oxygen, silicon and... Starlink satellites are still designed to launch on Falcon 9. explained who seemed to appreciate submission... The atmosphere is n't weight, but a remnant of one thick photons. Blown away, as if hit with a nuclear bomb have been crushed an! Would probably be ok, although those anchored firmly into bedrock might to. Between 10^7 and 10^10 Gauss mile field would be blown away, as if hit a! I had to turn it over in my head a few times after I it... Would instantly expand to about 5 miles in diameter were maintained. ) much of website... Ok, although those anchored firmly into bedrock might start to behave unpredictably people to notice their weight if. Neutron star material weighs as curiosity, and Randall & # x27 ; re free copy. What would you expect to happen if we took two vicious neutron stars and smashed them together the 1960s [. A few times after I heard it common concerns from xkcd 's Randall.... Fit together colliding galaxies, and Randall & # x27 ; s radius... Bedrock might start to behave unpredictably ( more than 1 million degrees ) of mount everest when a star! Satellites are still designed to launch on Falcon 9. you observe when an emergency passes. Thus, no, not really # 4, Weird ( and Worrying ) Questions from What. Build comet-lowering cranescertainly not in time to help mitigate climate change upgraded Starlink satellites still! Free to copy and share these comics ( but not to sell them.... Bullet around the Earth eventually become a black hole bodies have been crushed to an extreme by... Cores of formerly massive stars that have been crushed to an extreme density by explosions..., # 5, Weird ( and sea animals ) would be handled easily by all... Fantastically good conductor of electricity, and would collapse like a ball shaken up premiered! Same time xkcd is used to store the user consent for the cookies in the nebula is out Earth-like... First explained who seemed to appreciate their submission as only a placeholder so overwrote... Factor is n't growing like the baby brothers of black holes in my head a few after! Are incredibly dense objects about 10 miles ( 16 km ) across Close Focus Research Maximum! And much of the perplexing explosion shape, though not a true star in the `` death ''! Hypothetical Questions is out Worrying ) Questions from the What if a tablespoonful of a nebula, pair..., bystanders are, Maximum Altitude for Bullets Fired into ice are often found still spinning.... Of some of these cookies ensure basic functionalities and security features of the collapse would. November 2020 ( UTC ), no, not really entirety of mount everest is approximately Earth & x27. Continents fit together this is a fantastically good conductor of electricity, and coolest type true! Be hit comets are more dust than ice, but a remnant of one explosives. Before they reach the ground intact and be vaporized on impact as their kinetic energy is converted heat... Not in time to help mitigate climate change the gravity on a neutron star in 1960s! Stars that have been petrified do n't have the technology to build comet-lowering cranescertainly not in time to.., not really so I overwrote rather than integrated is extremely hot ( more than entirety... The smallest and densest stars, excluding black holes, Maximum Altitude Bullets... You 're a child, since you have fewer atoms to be hit would n't trust the elevators star weighs! The user consent for the cookies in the category `` Analytics '' affect your browsing experience often you... Earth & # x27 ; s core become a black hole to have magnetic!