Researchers have made a breakthrough in quantum thermometry, enabling the precise estimation of temperature in a cosmological Anti-de Sitter (AdS) spacetime using single-qubit sensor configurations. By introducing an ancillary Unruh-DeWitt detector, they have characterized the achievable estimation accuracy using the Quantum Fisher Information (QFI) and the associated quantum signal-to-noise ratio. This approach allows for non-Markovian temperature sensing, which is crucial for understanding the thermal properties of AdS spacetime. The study demonstrates the potential of relativistic quantum thermometry in estimating temperature with high precision1. This advancement has significant implications for the field of quantum physics, particularly in the context of cosmological studies. The ability to accurately estimate temperature in AdS spacetime can provide valuable insights into the underlying mechanisms of the universe, making it a crucial area of research for practitioners in the field of quantum physics and cosmology.