无线电频谱

Astronomers have published the first radio image that resolves two supermassive black holes orbiting each other at the heart of quasar OJ287, confirming a decades‑old prediction... 二月 10, 2026

Spacecraft have recorded 'chirping' radio emissions far from Earth’s surface — a discovery that rewrites where and how magnetospheric waves form and raises fresh questions about... 二月 07, 2026

A paper from Xidian University describes a reconfigurable metasurface that can switch between scattering and radiation modes and harvest ambient radar energy—an advance that cou... 一月 05, 2026

An amateur astronomer discovered that a fleet of classified SpaceX satellites is transmitting on uplink frequencies normally reserved for ground stations, raising questions abou... 十一月 21, 2025