word
dark matter halo
DARK MAT-er HAY-loh
dɑːrk ˈmætər ˈheɪloʊListen
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Syllable breakdown
darkmatterhalo
Dictionary meaning
vast, roughly spherical region of dark matter surrounding a galaxy or galaxy cluster; the gravitational influence of the halo is essential for explaining galactic rotation curves, which show stars at the galaxy's outer edges orbiting far faster than visible mass alone can account for
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