A vision for ground-based astronomy beyond the 2030s: How to build ESO's next big telescope sustainably

TL;DR

This paper emphasizes the importance of sustainability in building ESO's next-generation telescope, advocating for environmentally responsible practices to ensure future astronomical exploration.

Contribution

It proposes sustainability guidelines for ESO's future telescope projects, integrating environmental considerations into the planning process.

Findings

Highlights the carbon footprint of astronomical facilities

Proposes sustainability guidelines for future telescope construction

Emphasizes the urgency of protecting Earth's environment for astronomy

Abstract

Astronomy is the study of the Universe and all the objects that it comprises. Our attention is therefore usually focused beyond Earth, home to the only form of life known today. However, how can we continue to explore the secrets of the Universe, if we stand by and watch our only home burn? We know that there is no Planet B. It is therefore urgent that, as astronomers, we collectively work to protect the Earth, allowing future generations the opportunity to continue to uncover the secrets of the cosmos. As astronomical facilities account for the majority of our community's carbon footprint, we propose guidelines that we hold crucial for the European Southern Observatory (ESO) to consider in the context of the Expanding Horizons programme as it plans a next-generation, transformational facility.