'Astronomers have to revise estimates': The Milky Way may be larger, heavier and more lopsided than we realized

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'Astronomers have to revise estimates': The Milky Way may be larger, heavier and more lopsided than we realized Live Science NASA’s Chandra Examines Milky Way at Arms’ Length NASA Science (.gov) Our Milky Way galaxy might be larger than we thought Space The Milky Way's Arms Reach