Ground-based astronomy under threat: Rubin begins survey amid regulatory failures on light pollution; Vantablack offers mitigation; UK funding crisis threatens Jodrell Bank and ELT instruments
Key Questions
What threat does satellite light pollution pose to ground-based astronomy?
The FCC approval of Reflect Orbital's Eärendil-1 sets a precedent that could enable 50,000 mirror satellites. This risks interfering with surveys like Rubin Observatory's LSST.
How might Vantablack coating help mitigate satellite interference?
A MNRAS study shows Vantablack 310 reduces satellite reflectivity to 2%, meeting IAU brightness thresholds. It offers a practical mitigation strategy for preserving dark skies.
What is the status of the Vera C. Rubin Observatory's survey?
Rubin has begun its 10-year LSST survey, promising major advances in supernova cosmology and transient detection. Regulatory gaps on light pollution remain a concern for its long-term success.
The Vera C. Rubin Observatory (LSST) has started its 10-year survey, revolutionizing supernova cosmology and transient detection. However, the FCC has approved Reflect Orbital's Eärendil-1 mirror satellite, setting a dangerous precedent for light pollution and threatening observatories like Rubin. Astronomers warn this could enable 50,000 such satellites, following earlier ESO warnings about satellite constellations. A new study in MNRAS shows that Vantablack 310 coating can reduce satellite reflectivity to 2%, meeting IAU brightness thresholds, offering a concrete mitigation strategy. Additionally, the UK government's science funding cuts threaten the iconic Jodrell Bank Observatory (Lovell Telescope), instruments for the ELT, and LHC upgrades—a systemic underfunding crisis that endangers major facilities. This dual threat (light pollution and funding) is a critical concern for the future of ground-based astronomy.