March 5: The Museum in Washington, DC will open today. Due to weather, the Udvar-Hazy Center in Chantilly, VA is closed.
This dosimeter was flown on the Apollo 11 in July 1969. Dosimeters were designed to measure the cumulative radiation doses each astronaut received during the course of the mission.
Transferred to the National Air and Space Museum from NASA in 1972.
Transferred from NASA