NASA crashes probes into moon

As scheduled, the Gravity Recovery and Interior Laboratory probes Ebb and Flow crashed into a mountain on the moon, ending a fruitful mission to study the surface and composition of the celestial body.
"The two probes were sent purposely into the moon because they no longer had enough altitude or fuel to continue science operations," NASA said.
The agency named the site where the spacecraft crashed for Sally Ride, the first American woman astronaut in space. She died in July.
Ebb and Flow crashed on a mountain near the moon's north pole at 2:28 p.m. PT and 2:29 p.m. PT at a speed of 3,760 mph, NASA said. They were about the size of a washer and dyer.
"We will miss our lunar twins, but the scientists tell me it will take years to analyze all the great data they got, and that is why we came to the moon in the first place," said GRAIL project manager David Lehman of NASA's Jet Propulsion Laboratory. "So long, Ebb and Flow, and we thank you."
Thanks to GRAIL, scientists now have the highest-resolution gravity field map of any celestial body, NASA has said. That means the probes have been making a high-quality map of the gravitational field of the moon, giving scientists unprecedented insight into what's below the surface and how the moon may have formed.
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