Which sustainability initiative has revolutionized modern astronomical observatories, significantly reducing their carbon footprint while maintaining optimal observation capabilities?

Astronomical observatories and space agencies have been implementing innovative sustainability initiatives to reduce their environmental impact while continuing to explore the cosmos. From renewable energy powering observatories to reducing light pollution, the astronomy industry has pioneered unique approaches to environmental conservation. Test your knowledge about these cosmic sustainability efforts that are helping to protect our planet while studying the stars!

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Solar-powered adaptive optics systems that require 90% less energy than traditional systems while improving image resolution by counteracting atmospheric turbulence
Quantum-cooled telescope mirrors that eliminate the need for liquid nitrogen cooling, reducing operational costs by 75% and extending observatory lifespans
Biodegradable dome materials that naturally decompose after 50 years, allowing observatories to be rebuilt with minimal environmental impact
Gravity-powered data centers that convert the rotational energy of observatory domes into electricity, making them energy-independent during nighttime operations