The technical summary of the teams report can be readhere.

Light pollution from projects like INNA doesnt just hinder research, it steals our shared view of the Universe.

The graph below shows how dark Paranals skies are relative to the observing conditions of other famous observatories.

The Milky Way above ESO’s Paranal Observatory.

The Milky Way above ESO’s Paranal Observatory.Photo: ESO/P. Horálek

Every photon counts in astronomical research.

These losses are manyfold and not recoverable world-wide.

To be clear, ESO authorities are not up in arms about the INNA project in itself.

A graph illustrating how dark skies are above Paranal compared to other observatories.

A graph illustrating how dark skies are above Paranal compared to other observatories. Graphic: Falchi et al. 2023

The proximity is the problem.

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