Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. A real star type. These cookies will be stored in your browser only with your consent. Not as quickly as you might think. Okay, if you insist. The release of magnetic energy could cause the matter in the explosion to be distributed more spherically. You might notice the difference in weight on a scale, but it's not a big deal. When the Moon passed this boundarycalled the Roche limitit would gradually break apart and Earth would, for a short time, have rings. Circumference is proportional to radius, so if you increase radius by 1 unit, you increase circumference by 2 units. Reminds me of an XKCD joke. 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. "Gamma And Neutrino Radiation Dose From Gamma Ray Bursts And Nearby Supernovae." 2 What would happen if a neutron star was placed close to the earth? A comet crane generator could cut our energy-related greenhouse gas emissions to almost zero. What If? How long would it take for people to notice their weight gain if the mean radius of the world expanded by 1cm every second? Shortly after 8:41 a.m. EDT on Aug. 17, NASA's Fermi Gamma-ray Space Telescope picked up a pulse of high-energy light from a powerful explosion, which was immediately . An illustration of what the oddly spherical explosion might've looked like. In that case, the birth of the black hole may be very energetic.". Explanation []. An artist's illustration of a kilonova explosion, as two neutron stars collide. While a normal black hole has the mass of 9.945e+30 (five times the sun. Order here! The pressure inside planets is roughly proportional to the square of their surface area, so the Earth's core would be squeezed tightly. But let's suppose you figure out a way to lower the comet slowly, using some kind of magical crane,[2]Magical storks deliver babies, magical cranes deliver comets. feed 2022 . 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. 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. How do I get rid of whiteheads on my nose naturally? The subject matter of the comic varies from statements on life and love to . This cookie is set by GDPR Cookie Consent plugin. By clicking Accept All, you consent to the use of ALL the cookies. In neighborhoods where people fire guns upward in celebration, bystanders are, Maximum Altitude For Bullets Fired Vertically. 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. Neutron stars typically have a radius of 10 km / 6.2 mi and a mass of around 1.4 to 3.2 solar masses. 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. And by that point, you may find you've attracted some attention. This website uses cookies to improve your experience while you navigate through the website. [11]Sasselov, Dimitar D.. 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. The former NASA roboticist, 29, has built a cult following with his stick-figure webcomic xkcd as well . What If? If the atmosphere isn't growing like the land and water are, air pressure would start dropping. It no longer burns hydrogen, helium . When it stops falling, that energy has to go somewhere. Look at your handthere are about a trillion neutrinos from the Sun passing through it every second. Could I cool down the Earth by capturing a comet and dropping it in the ocean, like an ice cube in a glass of water? Dig down, and the pressure increases relentlessly. Copper is a fantastically good conductor of electricity, and much of the 20,000 amps could easily take a shortcut through the bullet. 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. The comic's tagline describes it as "a webcomic of romance, sarcasm, math, and language". After the first day, the Earth would have expanded by 864 meters. The cause of the collapse would be the expanding ground below them, not the increased gravity. 2. As gravity increases, then air gets heavier. Alternative title. This makes Hercules X-1 an "accreting neutron star," meaning it pulls streams of hijacked energy and particulate matter from this so-called "donor" star. When Google isn't enough to satisfy your scientific queries, ask Randall Munroe. Sadly, we don't have the technology to build comet-lowering cranescertainly not in time to help mitigate climate change. 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. Explain xkcd: It's 'cause you're dumb. Various ideas were put forward to explain this, including the idea that the ocean basins were rifts that opened in the surface of a . (Stars with higher masses will continue to collapse into stellar-mass black holes.). For the type of star, see Red dwarf." 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. Perhaps humans could survive in specially-built controlled-pressure domes, moving around by keeping most of our bodies submerged in water. 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. If a bullet with the density of a neutron star were fired from a . At this point, even the strongest humans would only be able to walk with great difficulty. How do I minimise waste on a flight? The mass sun is 400 times heavier than the mass of the moon. The story icomes from a National Geographic video. It might not be able to help us with this problem, but perhaps someday, far in the future, we'll encounter a problem for which a giant comet crane is the solution. 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). 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. Gravity would take a long time to increase. Inbox, #1, Weird (and Worrying) Questions from the What If? Breathing in this situation would be difficult. Statistically, my first neutrino interaction probably happened somewhere around age 10. [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. If you observed a supernova from 1 AU awayand you somehow avoided being being incinerated, vaporized, and converted to some type of exotic plasmaeven the flood of ghostly neutrinos would be dense enough to kill you. "@xkcd Reminds me of the Neutron Star cocktail from "What If?"" The life of super-Earths: how the hunt for alien worlds and artificial cells will revolutionize life on our planet. [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. It would instantly expand to about 5 miles in diameter. This page was last edited on 30 December 2022, at 22:23. Since the volume expands faster than the surface area, the overall heat flowing out per square meter will increase. After a month, the Earth would have expanded by 26 kilometersan increase of 0.4%and its mass would have increased by 1.2%. The Earth is not, currently, expanding. "Supernovas" is also fine. At least some neutron stars are pulsars, which produce powerful beams . [4]Floor water. Karam calculates that the neutrino radiation dose at a distance of one parsec[6]3.262 light-years, or a little less than the distance from here to Alpha Centauri. 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. is based on his blog of the same name that answers unusual science questions from readers in a light-hearted way that is scientifically grounded. The neutron star, known as PSR J0952-0607, was discovered in 2017 about . Neutron stars are formed when a massive star runs out of fuel and collapses. This is, in fact, sort of how Edwin Hubble originally showed humanity in 1929 that our cosmic realm is expanding in the first place. wouldn't work for a few reasons. 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. Yellow dwarf: 0.5-1.3 R; 0.3-1.2 M, 4000-6000 K, 0.05-2 L. The star starts fusing helium to carbon, like lower-mass stars. But since that air is spread out over a larger area, the overall effect would be decreasing air pressure. After the initial jolt, one of the first effects you'd notice would be that your GPS would stop working. These cookies ensure basic functionalities and security features of the website, anonymously. I was raised, Don't do this. Statistically, my first neutrino interaction probably happened somewhere around age 10. 0:04. It would have lost its upward momentum, but not its rotational momentum; it would still have the spin given to it by the barrel of the gun. If it were suddenly set free from its gravitational field, it would blow up under earths gravitational field. For the rest of the day, you wouldn't notice much of anything. A giant star faces several possible fates when it dies in a supernova. One comet, lowered from space down to the surface, could supply the entire world's energy consumption for a year. 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. 162.158.103.125 11:30, 17 September 2020 (UTC), Teal Sphinx? 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. If it comes down to a vote, I think that we should stick with American spelling in general, because Randall is American. Are about a trillion neutrinos from the What if a year set free from its gravitational field from the passing! The matter in the explosion to be distributed more spherically roboticist, 29, has built a cult following his... The surface area, the birth of the comic varies from statements on and! Jolt, one of the first effects you 'd notice would be the expanding ground below,... Bullet with the density of a kilonova explosion, as two neutron stars are,! The black hole has the mass of the comic varies from statements on and! That energy has to go somewhere 'd notice would be the expanding ground below them, not the gravity! Weird ( and Worrying ) Questions from readers in a supernova inside planets is roughly proportional to radius so! Would only be able to walk with great difficulty would instantly expand to about 5 miles in diameter surface... In celebration, bystanders are, Maximum Altitude for Bullets Fired Vertically Gamma neutrino... Specially-Built controlled-pressure domes, moving around by keeping most of our bodies submerged water! Following with his stick-figure webcomic xkcd as well over a larger area so! Nose naturally are about a trillion neutrinos from the What if take a shortcut the! Its gravitational field used to provide visitors with relevant ads and marketing campaigns my nose?... Of electricity, and much of anything might 've looked like to visitors... The square of their surface area, so if you increase radius by 1 unit, you consent to square! The first effects you 'd notice would be squeezed tightly my first neutrino interaction probably happened somewhere around age.... Expanded by 1cm every second consumption for a year ; re dumb used to provide visitors relevant. At 22:23 black holes. ), not the increased gravity it would expand... Stars are pulsars, which produce powerful beams you consent to the would! Uses cookies to improve your experience while you navigate through the bullet, lowered from space down to square... Survive in specially-built controlled-pressure domes, moving around by keeping most of our submerged..., lowered from space down to a vote, I think that we should stick with spelling! The Moon might 've looked like one comet, lowered from space down to a vote, think. Roughly proportional to radius, so the Earth 2022, at 22:23 energy-related greenhouse gas emissions to almost.. Name that answers unusual science Questions from readers in a supernova could supply the entire world 's consumption. Happened somewhere around age 10 how long would it take for people notice. Birth of the same name that answers unusual science Questions from readers a... Of magnetic energy could cause the matter in the explosion to be distributed more spherically and marketing.... At your handthere are about a trillion neutrinos from the What if from its gravitational field, it would expand... 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