O ne of Earth’s seven quasi-moons has just got a new name: Asteroid 2004 GU9 is now known as Cardea, one of the Roman deities of doors and thresholds with a particular focus on hinges.
According to expert Chris Herd, it's an "ordinary chondrite," the most common kind of meteorite Have you ever wondered what a meteorite hitting Earth sounds like? Last July, Joe Velaidum and ...