AST BlueWalker 'Should Give Pause,' IAU Says

AST SpaceMobile's BlueWalker 3 prototype satellite "is now one of the brightest objects in the night sky, outshining all but the brightest stars," and its use of terrestrial frequencies "poses a new challenge to radio astronomy," said the International Astronomical Union Center for the Protection of the Dark and Quiet Sky from Satellite Constellation Interference (IAU CPS) Monday. The satellite “is a big shift in the constellation satellite issue and should give us all reason to pause,” said IAU CPS Director Piero Benvenuti. The group urged low earth orbit constellations to "be conducted with due consideration of their side effects and with efforts made to minimize their impact on astronomy." AST emailed it's "eager to use the newest technologies and strategies to mitigate possible impacts to astronomy." It said it's working on such mitigations as anti-reflective materials and is "also engaged with NASA and certain working groups within the astronomy community to participate in advanced industry solutions, including potential operational interventions." It said it's committed to avoiding broadcasts inside or adjacent to the National Radio Quiet Zone in the U.S. and additional radioastronomy locations as required or needed. "We also plan to place gateway antennas far away from the NRQZ and other radio-quiet zones that are important to astronomy," it said.