‘Bones’ in Milky Way could help map galactic structure
Gas tendrils trace location of spiral arms, study finds
![galactic skeleton](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/12/123015_cc_galaxy-bones_free.jpg?fit=860%2C460&ssl=1)
BARING BONES One of six bone candidates, seen silhouetted in this Spitzer Space Telescope image, lies about 11,000 light-years away; it is roughly 140 light-years long and 0.52 light-years wide.
JPL-Caltech/NASA, Univ. of Wisconsin