A fireball, astronomers explain, is simply a very bright meteor – brighter than magnitude -4, roughly equivalent to the brilliance of Venus in the morning or evening sky. A bolide is a specific type ...

SpaceX CEO Elon Musk has backed a mission to Mars to investigate the remarkable 'square structure' (pictured) that was captured on NASA's Mars Orbiter Camera.

NATO boss Mark Rutte urges Keir Starmer to step up defence spending ...