When it was launched in 1990, the Hubble Space Telescope carried a powerful battery of instruments to examine the universe in exquisite detail. One of the most spectacular early observations was of a supermassive black hole in the center of a giant elliptical galaxy. In this week's Ask an Expert on Facebook Live, space history curator David DeVorkin will examine the machine that made the observation. 

Planning to attend in-person? Meet in the Explore the Universe gallery. 

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.