Ten years ago, La Palma was declared a "Starlight Reserve" and measures were implemented to protect its skies from light pollution. How did they work?
The European Space Agency's Gaia mission has released its first data release, mapping a billion stars across the Milky Way and beyond
A new website shows how light pollution spreads around the globe — using data gathered by its users.
Are we really doing enough to find asteroids, especially the smaller ones that could destroy a city? A private initiative urges a rapid ramp-up of the search effort — but not everyone agrees.
The top of Cerro Armazones in Chile yielded on June 19th to a blast that paves the way for the European Extremely Large Telescope.