The undeployed Black Hole Coded Aperture Telescope (BlackCAT) CubeSat undergoes thermal-vacuum (TVAC) and vibrational testing at E-Labs, Inc. to validate its design for space operations. Credit: Photo courtesy of Lukas Stone, High-Energy Astrophysical Detector & Instrumentation (HEADI) Lab, The Pennsylvania State University in collaboration with NASA Goddard Space Flight Center, Los Alamos National Laboratory, and NanoAvionics. Provided to HEASARC with permission. No endorsement implied.