How To Get FREE entry to Longway Planetarium and Sloan Museum of Discovery Labor Day Weekend Shared by Mrs. Weber Leave a Comment Click here to learn How To Get FREE entry to Longway Planetarium and Sloan Museum of Discovery Labor Day Weekend and November 2-4, 2022! Share:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to email a link to a friend (Opens in new window)MoreClick to share on Reddit (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to print (Opens in new window)