Does Our Solar System Contain a Primordial Black Hole?



There's something big lurking in the frozen hinterlands of our solar system that appears to be tugging at the a tiny worlds beyond the orbit of Neptune the object is assumed to be a hypothetical world called planet nine which has extremely far-flung orbit around the Sun and causes all kinds of gravitational chaos out there in the dark but as the search for planet nine wears on and astronomers have yet to so much get a glimpse of it some researchers are pondering the object could be might not be planted at all could it be a primordial black hole the solar system is a big place and while astronomical techniques are rapidly advancing many tiny bodies in the outer solar system have yet to be found planet nine thought to be a rather more substantial object however with massive around five to ten earth masses scooting around the sun at an average distance of four hundred to eight hundred astronomical units or a US since one a you is that average distance at which earth orbits the Sun that's ten to twenty times the orbital distance at which Pluto orbits the Sun So if exists planet nine takes between ten thousand in twenty thousand years to complete just one orbit the possibility of a large world orbiting the Senate such a huge distance is captivating studies of other stars system's reveal that exoplanets between the masses of Earthen Neptune are relatively common why our solar system doesn't contain a world with this mass range is a puzzle but a planet nine really is out there it would be profound historic discovery that would reshape our understanding of the system of planets that orbit our sun suffice to say any planet with an orbit this extreme would be very difficult to spot but astronomers are scouring infrared surveys with hopes of seeing distant object slowly crawl across the sky if it's out there planet nine should be emitting infrared radiation energy leaking from the planet since its formation but so far apart from the gravitational effect of something in the outer solar system there's precious little direct evidence for Planet Nines Existence Enter the Black Hole hypothesis in September nineteen astronomers Jacob Schultz Durham University and James Unwin of the University of Illinois at Chicago published a new study describing their alternative hypothesis the gravity personal weirdness in the outermost reaches of the solar system isn't being caused by planet at all instead they pointed to the potential presence of a primordial black hole a theory it's caused a bit of a stir no this kind of black hole does not pose danger to the rest of the solar system it'd be too small for that but in the distant regions solar system it's impact would be significant the only evidence we have for Planet Nines Existence are the gravitational effects it's having on Trans Neptune objects and Black goals are the most gravitationally endowed objects in the universe after all primordial black holes are the most ancient kind of black hole there hypothesized to a formed right after the Big Bang density fluctuations in the early universe what have rapidly formed black holes of all masses these ancient objects would have been flung throughout the cosmos and over time they would have slowly evaporated via hawking radiation smaller ones popping out of existence I but let's back up a step why does scientists think that some extreme object is out there in two thousand sixteen planet Hunters Constantine but Teagan and Mike Brown of Caltech announced their discovery of a group a very distant Trans Neptune objects the were all strangely clustered moving was similar orbital alignments their orbital alignment was also weirdly tilted so it appeared they were all being corralled by gravitational interactions with a larger planetary body but no other large planetary body exists in that region so Teigen and Brown hypothesized an as yet to be discovered planet was out there and so the hunt began while many theories of cosmic evolution suggest that primordial black holes should exist we have yet to directly observe one though there is some compelling indirect evidence take for example microloans what's the transient brightening of stars caused by massive object passing in front of them causing a brief brightening by the curvature of space time creating sort of magnifying lens analysis of these micro lens events suggests that there's a population of small black holes out there with no other visible clues except for their gravitational impact on space time mm-hmm Shilton unwin took a fresh look at the Trans Neptune object peculiarities and simulated. What would happen if a black hole with a mass of between five and ten earth masses had an extreme orbit around the sun sure enough their models suggest that primordial black hole with a mass within this range would cause orbital turbulences like the ones already observed in the population of Trans Neptune objects this could also explain why little optical or infrared observational evidence for planet nine exists a primordial black Cole would generate neither signal in fact if a black hole is nearby and may also be dragging around a cloud of dark matter that could be generating different types of radiation searchers therefore suggest based on their findings the experimental program needs to be expended including searches for high energy cosmic rays like x rays and gamma rays coming from moving sources while this is an interesting avenue of steady replacing hypothetical planet with a hypothetical type of black hole may be overcomplicating the mystery the planet nine we spoke with Mike Brown he said could blackhall explain the gravitational effects we are seeing in the outer solar system absolutely all we know is there is a six earth mass something out there and we don't know what the something is Brown points out that planet would be the most obvious something but as long as it has a mass of a few earth's could be anything but the plausibility of it being anything other than a planet is extremely low to say the least with tongue in Cheek Brown added it might be a six earth mass hamburger or a Burrito but yes it might also be a six earth mass black hole the physics of course don't care one bit what the six earth mass are made of you could equally well hypothesize that every exit planet that we only detected by the radial velocity method is a black hole is it possible yes does it make any sense in the unit I know while investigating other gravitational sources of what may be messing with Trans Neptune objects is good science. It's more likely the planet when is a planet and not a primordial black hole astronomers just have to keep searching and there's a growing consensus that will be discovered in the not so distant future

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