Galactic 'wave' may have once washed over Earth, astronomers say

Revelations are helping to explain the "Radcliffe Wave," a chain of star-forming clouds that the largest coherent structure ever seen in our galaxy — 9,000 light-years from end to end.

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Henrietta Leavitt ,Bob Benjamin ,Joao Alves ,Ralf Konietzka ,Alyssa Goodman ,Catherine Zucker ,Harvard Smithsonian Center ,Radcliffe College ,European Space Agency Gaia ,University Of Wisconsin At Whitewater ,Milky Way ,Radcliffe Wave ,European Space Agency ,Orion Arm , ,