GRAIL First Results Provide Most Precise Lunar Gravity Map Yet

By Nancy Atkinson December 5, 2012
GRAIL First Results Provide Most Precise Lunar Gravity Map Yet

This map shows the gravity field of the moon as measured by NASA's GRAIL mission. Image credit: NASA/ARC/MIT

These maps of the moon show the "Bouguer" gravity anomalies as measured by NASA's GRAIL mission. Image credit: NASA/JPL-Caltech/CSM

A linear gravity anomaly intersecting the Crisium basin on the nearside of the moon has been revealed by NASA's GRAIL mission. The GRAIL gravity gradient data are shown at left, with the location of the anomaly indicated. Red and blue correspond to stronger gravity gradients. Topography data over the same region from NASA's Lunar Reconnaissance Orbiter's Lunar Orbiter Laser Altimeter are shown at right; these data show no sign of the gravity anomaly. Credit: NASA/JPL-Caltech/CSM

These maps of the near and far side of the moon show the gravity gradients as measured by NASA's GRAIL mission, highlighting a population of linear gravity anomalies. Image credit: NASA/JPL-Caltech/CSM

Artist concept of GRAIL mission, with two twin spacecraft in tandem orbits around the moon to measure its gravity field in unprecedented detail. Image credit: NASA/JPL

Nancy Atkinson

Nancy Atkinson

Nancy Atkinson is a space journalist and author with a passion for telling the stories of people involved in space exploration and astronomy. She is currently retired from daily writing, but worked at Universe Today for 20 years as a writer and editor. She also contributed articles to The Planetary Society, Ad Astra (National Space Society), New Scientist and many other online outlets.

Her 2019 book, "Eight Years to the Moon: The History of the Apollo Missions,” shares the untold stories of engineers and scientists who worked behind the scenes to make the Apollo program so successful, despite the daunting odds against it. Her first book “Incredible Stories From Space: A Behind-the-Scenes Look at the Missions Changing Our View of the Cosmos” (2016) tells the stories of 37 scientists and engineers that work on several current NASA robotic missions to explore the solar system and beyond.

Nancy is also a NASA/JPL Solar System Ambassador, and through this program, she has the opportunity to share her passion of space and astronomy with children and adults through presentations and programs. Nancy's personal website is nancyatkinson.com