Today in Space History - Charting the Moon's Gravity 🚀
Stardate 2651.5508 (SEPTEMBER 10, 2011)
On this day fifteen years ago, a Delta II rocket carried NASA's GRAIL twins into space from Cape Canaveral. The paired spacecraft would travel separately to the Moon, entering orbit to measure its gravitational field with remarkable sensitivity.
Their precise data would map variations hidden beneath the surface, shedding light on the Moon's internal structure and the processes that shaped it billions of years ago. Such measurements remain a quiet foundation for understanding rocky worlds across the solar system.