News IAU offers provisional details of threat due to satellite constellations 12 February 2020 Astronomy Now The International Astronomical Union raises more red flags about the possible impact of large satellite constellations on Earth-based astronomy.
News Earth’s ‘plasmaspheric hiss’ protects against a harmful radiation belt 27 November 2014 Astronomy Now Researchers at MIT, the University of Colorado and elsewhere have found that very low-frequency electromagnetic waves in the Earth’s upper atmosphere form a shield, protecting the planet’s surface from the Van Allen belt’s high-energy radiation.
