For the past ten years, astronomers have puzzled over cosmic ripples in the structure of the Milky Way that didn't have a known cause. Thanks to a trio of pulsing stars, we now suspect a dwarf galaxy made of dark matter swung through our galactic neighborhood 500 million years ago -- with results we can still see today.
from ExtremeTech http://ift.tt/1niN88b
ليست هناك تعليقات:
إرسال تعليق