A new carrier-phase-based method for satellite-ground time synchronization has ushered in a new era of precision, achieving picosecond-level accuracy that far surpasses traditional methods.

A new study published in the Journal of Cosmology and Astroparticle Physics (JCAP) presents a methodology to test the assumption of cosmic homogeneity and isotropy, known as the Cosmological Principle, by leveraging weak gravitational lensing—a light distortion effect described by general relativity—in astronomical images collected by new observatories such as the Euclid Space Telescope. Finding evidence of anomalies in the Cosmological Principle could have profound implications for our current understanding of the Universe.

Astronomers may have discovered a scrawny star bolting through the middle of our galaxy with a planet in tow. If confirmed, the pair sets a new record for the fastest-moving exoplanet system, nearly double our solar system’s speed through the Milky Way. The planetary system is thought to move at least 1.2 million miles per hour, or 540 kilometers per second.

The research team of Wang Jianli of the Chun Institute of Optics, President of the Chinese Academy of Sciences, has made progress in the observation of space objects based on metalens. In this study, the 2D concentric-ring structure, which is easier to process, is used as the basic configuration of the metalens, and the 2D meta-atoms are designed to be compatible with transverse electromagnetic wave and Transverse magnetic wave modes .Therefore, a portable telescopic system with a concentric-ring metalens with a diameter of 5cm as the main lens was developed, which achieve high-resolution detection within a 20° field of view, and further advances the deep application of metalens in the field of astronomical observation.