When I heard the Learn’d Astronomer

When I Heard the Learn’d Astronomer is a poem by Walt Whitman, first published in 1855 as part of his seminal work, Leaves of Grass. The poem reflects Whitman's critique of formal education and scientific rationalism, contrasting it with the awe of direct experience with nature. Notable for its use of free verse, the poem exemplifies Whitman's aim to create a distinctly American literary voice. Whitman’s innovative style and themes of individuality and transcendence have had a lasting impact on American poetry.