How do i take the subway from penn station to Hayden Planetarium?

To get to the Hayden Planetarium from Penn Station, take the A, C, or E subway line from 34th Street-Penn Station. Transfer at 42nd Street-Port Authority Bus Terminal to the 1 subway line, then travel uptown to 79th Street. From there, it's a short walk to the American Museum of Natural History, where the Hayden Planetarium is located.