The Milky Way — and in fact our entire galactic neighborhood known as the Local Group — appear to be lodged in a vast, …
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The Milky Way — and in fact our entire galactic neighborhood known as the Local Group — appear to be lodged in a vast, extended “sheet” of dark matter flanked on each side by cosmic voids, a new study published in the journal Nature Astronomy suggests. The findings could help explain the puzzling motion exhibited by our nearby galaxies, which seems to defy the gravitational influence of neighboring realms. To take a stab at solving the longstanding astronomical mystery that Andromeda is…