NASA's GRAIL Probes Launched to Map Moon Gravity

On September 10, 2011, NASA launched the GRAIL spacecraft to study the moon's gravity. This mission was important because it helped scientists understand the moon's surface and its history. By mapping the gravity, researchers could learn more about how the moon was formed and how it has changed over time. This exciting project shows how space exploration can teach us about our solar system!

Based on reporting from Space.com. Read the original story →