 Galactic eviction, does this mean that there are rogue stars found in our Milky Way Galaxy that have been flung out from the insides of our galaxy? This is going to be your space pod for Thursday, March 8th, 2018. Astronomers have made a discovery of the birthplace of stars found in the halo of the Milky Way Galaxy. The halo is the outer region of a galaxy, and astronomers have now found proof that the stars located in this region do indeed originate from the inner disk of the galaxy and were kicked out in this so-called galactic eviction. Astronomers at Max Planck Institute for Astronomy found key evidence that these stars located in the halo of the galaxy truly did originate from the disk, and through an interaction of a dwarf galaxy passing through the disk, it caused these stars to get totally flung out into the outer regions of the Milky Way. They were able to make these measurements based off of oscillations in which these inception caused ripples in the fabric of space, leading to these stars being ejected outward. These oscillations have a crazy name, and that's galactic socemology, which actually theoretically predicted decades ago, and now scientists have evidence for this in the Milky Way's disk. The way scientists found this was through analyzing chemical compositions of these stars and found that they were made up of the same as the stars in the galactic-thin disk, which is the younger part of the Milky Way located in the galactic plane. They analyzed the spectra of 14 stars located in two different halo structures, the triangular mandromeda and the A13 stellar over densities. These two structures lie on complete opposite sides of the Milky Way galaxy, roughly 14,000 light-years above and below the galactic plane. The scientists did this by using the Keck Observatory's high-resolution etchel spectrometer known as high-res, and they found almost identical chemical compositions for these stars with those in the galactic plane, and this showed strong evidence that these stars likely originated in the galactic plane. It's super exciting this seems that this galactic socemology prediction may stand true. Our Milky Way galaxy may be much more complex and dynamic than we had already thought. Future research includes determining the masses and ages of these stars to hone in on the time limits of when this galactic eviction may have taken place. So this research is super exciting because it's really going to answer a lot of unanswered questions about our galaxy and the stars located in the halo that surrounds it. So if you like this video, be sure to check out our video from last week, which is Space 11.09. And be sure to like and subscribe to see more of our videos. Thanks for watching, guys. Bye!