Note: this week's Ask an Expert will take place at a special time: 1:30 pm.

The Smithsonian has been monitoring the Sun for over one hundred years, from the National Mall in Washington, DC, from mountain stations around the world, from high-altitude balloons, and finally from space.  We display many of the devices the Smithsonian built and used in the  Steven F. Udvar-Hazy Center's James S. McDonnell Space Hangar. Join us on Facebook Live as we examine some of them and talk about how they worked on the ground, in the stratosphere, and in space.

Planning to attend in person? Meet at the back of the James S. McDonnell Space Hangar. 

Every Wednesday at 12:30 p.m. we will go live on the National Air and Space Museum Facebook page with an Ask an Expert talk. We’ll select a different aviation or space topic each week, and a Museum staff member will discuss the history, stories, or personalities related to a specific artifact or exhibition in the Museum. Tune in on Facebook Live each week to join the talk and ask our experts questions.