Terrifying Swarm Of Rogue Planets JUST DISCOVERED

 

The mention of a rogue planet may

 conjure up images of the death star

 but we should be happy that what astronomers have found is nothing of the sort

 up to 170 of these vagrants are in our cosmic backyard and surprised researchers say there may be several billion of them floating around our milky way completely free of host stars what does this mean for one what was recently thought to be a rather rare find now seems like anything but so how did astronomers locate this treasure trove of celestial oddities in our neighborhood and what can we hope to learn from them welcome the Science Reads in today's article we look at what we know about these planets and what we don't which is astronomical how do we learn more about these outcasts and what can the study of rogue planets tell us about our own origins most of us have some general vision of the order of the universe in our imaginations at last in that satellites orbit

 planets and planets travel around stars

 it fits into a logical pattern and is comfortable and then there are rogue planets rogue planets are free floating worlds that either became

 detached from their original host star

 or formed far away from existing stars they wander aimlessly like a cosmic flying dutchman charting its own course through space they are cold and dark and it is forever night on these worlds the sky must be a brilliant sight without an atmosphere or nearby star to cast what we call light pollution here on earth astronomers first detected one of these rogue planets in 1998 in the chameleon constellation some 554 light years from earth named OTS 44 this object is estimated to have 11.5 times the mass of Jupiter and a radius as large as 23 to 57 percent that of the sun OTS-44 is one of the lowest mass objects in the known universe and astronomers believe it is a disc composed of dust rocks and ice that may someday form a solar system of its own this relative newbie in the pantheon of

 celestial objects is possibly a brown dwarf an object trapped in astronomical purgatory between being an extremely large gaseous planet and the smallest of small stars these misfits are often alone in space with nothing to orbit though it is speculated that some miniature solar systems exist with planets orbiting their own brown dwarf before this recent groundbreaking discovery of our swarm of wandering neighbors

 astronomers had found less than two dozen of these oddities in 20 years of searching but now in this exciting time of seemingly exponential expansion of our cosmic knowledge we once again get to throw out the old books and fill new ones with discoveries and the possibilities they present astronomers cannot look at individual objects in space for the time it takes to notice a slight variation in a star's brilliance and they don't have to thanks to ogle the optical gravitational lensing experiment project that began almost 30 years ago a team from the university of Warsaw in Poland monitors millions of

 stars near the center of our milky way

 the process is called gravitational microlensing and requires the light source the lensing object such as a rogue planet and the observer

 to be perfectly aligned using microlensing to search for rogue planets since it does not depend on the brightness of the lensing object led to the exciting discovery of an earth-sized planet roaming freely through the milky way here's how this needle was found in June 2016 ogle detected a faint star in sagittarius that brightened a bit for about five

 hours before dimming back to normal

 astronomers collected enough data to determine that the object lensing the starlight is in fact a rogue world between the size of earth and mars with further study favoring a size closer to mars as exciting as this discovery was it only set the table for what astronomers were to discover next so how exactly did we find this trove of hard to detect neighbors anyway and can

 we even call them planets the international astronomical union which decides these things defines a planet as among other things an object that orbits a star which by definition these do not and finding a rogue planet is different from looking for exoplanets of which there are approximately 5000 confirmed as of december 2021.

 this band of unaligned worlds was discovered using over 20 years of data compiled from the European southern observatory's very large telescope the visible and infrared telescope for astronomy the VLT survey telescope and other facilities the team based in France and Austria took an almost unfathomable amount of data and merged it into a new picture of nearby space some of this data also came from the European space agency's GAIA satellite in a collaboration of ground and space-based observatories according to Herve Boy an astronomer and project leader for the team at the Laboratory Astrophysique de Bordeaux France we use tens of thousands of wide-field images from ESO facilities corresponding to hundreds of hours of observations and literally tens of terabytes of data astronomers searched for needles in the cosmic haystack pouring through mountains of observation and data to chart the tiniest motions colors and brilliance of targets in a large area of space what they found was startling in the upper Scorpius and Ophiuchus constellations there are up to 170 signatures of free-floating worlds will they all turn out to be exiles ejected from their solar system or remnants of star materials that never reach star status not likely but best estimates say at least 70 of the suspects are in fact free floating worlds at least the size of Jupiter why the uncertainty current observations do not give astronomers exact masses of the bodies and it is possible that many of them are failed stars or brown dwarfs some are detectable by their brief distortion of background starlight much in the same way as exoplanets however unlike exoplanets these distortions caused by crossing the path of a star's brilliance do not repeat themselves working in astronomers favor is that many of these rogues are thought to be much newer planets due to being found in areas of new star formation their relatively young age means they still have residual heat and are detectable in ways that exoplanets are not so these are neighbors we've just discovered what can they tell us and more importantly could they have life-supporting conditions these rogue planets do not orbit stars but it is very conceivable they have moons that orbit them researchers from the University of Concepcion in Chile created a mathematical model of these free worlds and their possible exo-moons and determined conditions may exist on both for liquid water and atmosphere basing their model on a Jupiter-sized rogue planet with an earth-sized moon

 scientists in Chile and Germany focused on the satellite while factoring in the thermal structure and composition of the two bodies they found that while the level of water would be much less than on earth the conditions may provide enough for life to develop and flourish also by studying these vagabond planets in relatively early stages of development it may be possible to grasp more clues about the formation of planets such as our own billions of years ago so how are we going to find out more about these hard to detect nomads i'm glad you asked we live in exciting times for new discoveries about our universe the successful launch of the James Webb space telescope foretells a treasure trove of new data that with any luck will begin pouring in during summer 2022 and by the mid-2020s presumably no later than 2027

 NASA's Nancy Grace Roman Space Telescope or roman space telescope is planned to launch with a very specific mission component concerning rogue planets remember gravitational lensing the method of finding untethered worlds that emit little or no light by observing their movement between the observer and a distant object roman will conduct a massive microlensing survey which is the narrower focus on gravitational effects of smaller objects on far away light sources the trick is and always has been to be reading at the right time since the microlensing event lasts from only a few hours to a couple of days nasa believes roman will detect rogue worlds as small as mars and by doing so narrow down the chaotic process of planetary formation different models proposed by scientists will be tested by roman which researchers say will be capable of detecting at least 10 times the number of these breakaway worlds that are currently possible the roman space telescope will have a field of view a hundred times greater than Hubble's meaning much more data in much less time it should also provide high contrast imaging of nearer rogue planets and give astronomers a more accurate estimate of their numbers some believe we will find there are more rogue planets in our milky way than there are stars want more excitement astronomers also await the completion of the European southern observatory's extremely large telescope which is under construction in Chile featuring a 130-foot segmented primary mirror this project will give humanity another eye into deep space one that can expand our knowledge of these mysterious planets that roam our cosmic neighborhood so what do you think about these newly discovered rogue planets and what can we learn about and from them are you excited about the new ways in which we are about to be able to peer into the universe and search for these and other mysterious objects tell us in the comments