Concern grows over bright satellites

Astronomers have called for more protections of our night sky

- Chris Lintott

A recently-launched bright satellite could pose a threat not only to visible astronomy but also radio observations, causing the International Astronomy Union IAU) to release a statement expressing concern over the growing number of bright satellites.

BlueWalker 3 BW3) is a prototype for a new constellation of around 100 telecommunications satellites called BlueBird. However, shortly after it was launched on 10 September 2022, astronomers noted it was extremely bright. The AU's Center for the Protection of the Dark and Quiet Sky from Satellite Constellation Interference CPS) has now collated measurements of the satellite, finding it reaches around magnitude 1.0 at its brightest similar to Antares, the 15th-brightest star in the sky.