NASA's NEO Surveyor and ASTHROS Share Clean Room

The dark, bulky instrument enclosure for NASA's NEO Surveyor is seen here (left) in the High Bay 1 clean room of the Spacecraft Assembly Facility at NASA's Jet Propulsion Laboratory in Southern California in March 2025. A major component of the mission, the instrument enclosure journeyed back to JPL in early March after completing environmental testing at NASA's Johnson Space Center in Houston. The gold-coated, circular antenna at right is part of the telescope for NASA's ASTHROS (Astrophysics Stratospheric Telescope for High Spectral Resolution Observations at Submillimeter-wavelengths), an atmospheric balloon mission; it has been in the clean room since December 2024.