At times the sun ejects energetic material into space which can have consequences for space-based and even ground-based electronic technology. Researchers aim to understand this phenomenon and find ways to forecast it, including how ejected material evolves as it travels through the solar system. For the first time, researchers, including those from the University of Tokyo, made high-quality measurements of an evolving cloud of solar ejecta by using multiple space-based instruments which were not designed to do so, and observed the way the clouds reduce background cosmic-ray activity.

Milan, 13^th January 2025  - The Politecnico di Milano has created the first integrated and fully tunable device based on spin waves, opening up new possibilities for the telecommunications of the future, far beyond current 5G and 6G standards. The study, published in the journal Advanced Materials, was conducted by a research group led by Riccardo Bertacco of the Department of Physics of the Politecnico di Milano, in collaboration with Philipp Pirro of Rheinland-Pfälzische Technische Universität and Silvia Tacchi of Istituto Officina dei Materiali - CNR-IOM.

A team of New York University scientists has created a gear mechanism that relies on fluids to generate rotation. The invention holds potential for a new generation of mechanical devices that offer greater flexibility and durability than do existing gears—whose origins date back to ancient China. 

Owing to the chaotic and non-integrable nature of three-body dynamics, the conventional Keplerian elements are rendered inadequate for cataloging cislunar space objects. Currently, there has been a conspicuous absence of universally recognized parameters for the characterization and cataloging of such objects, posing a significant impediment to effective cislunar space situational awareness. This research published in the Chinese Journal of Aeronautics proposes a novel approach to parameterize the orbits of the Earth-Moon collinear libration points by leveraging the theoretical frameworks of canonical transformations. Six characteristic parameters are established, which maintain a bijective correspondence with the state variables. Specifically, two parameters define the motion of the invariant manifold, while the remaining four parameters characterize the dynamics of the central manifold. Based on the parameters of central manifold, a situation map for depicting the distribution of libration point objects was developed, and its application in orbit identification was explored. This method furnishes novel instrumentation for enhanced space situational awareness and target cataloguing within the cislunar domain, enabling operators to effectively tag, track and manage cislunar objects with a compact, uncertainty-quantified parameter set.

A study from Shandong Technology and Business University uses game theory to explore rural distributed photovoltaic (PV) development from a prosumer lens. It identifies village-PV enterprise collaboration as key to scaling adoption, highlights the need to balance self-consumption and grid capacity to avoid curtailment, and provides targeted policy guidance for rural energy transitions.

A research team from the Beijing Institute of Technology (BIT) and Yinhe Hangtian has achieved a major advance in orbit mechanics by developing an analytical method capable of directly predicting spacecraft trajectories under third-body gravitational perturbations. This work, recently published in the Chinese Journal of Aeronautics, resolves a long-standing challenge in celestial dynamics and provides a new theoretical tool for deep-space exploration and autonomous spacecraft control.