The nation will honor recently departed space pioneer Neil Armstrong on Sept. 13 in a memorial service at the Washington National Cathedral. Armstrong, who mostly shunned the limelight after he became the first man to walk on the moon in 1969, died on Aug. 25. While the memorial service will be open to the public on a first come, first served basis, the service will also be broadcast via a NASA live stream. The National Cathedral already has a connection to Armstrong’s history-making voyage—the crew of the Apollo 11 mission deposited a moon rock in the sanctuary to commemorate the fifth anniversary of their trip.