Apollo moon rocks help grasp universe
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Moon rocks look rather nondescript 鈥 they are often gray in color 鈥 but for NASA planetary scientist Samuel Lawrence, they are the 鈥渕ost precious materials on Earth.鈥
What is certain is that the lunar samples first gathered by Apollo 11鈥檚 Neil Armstrong nearly 50 years ago have helped transform our understanding of the cosmos. Apollo astronauts collected 382 kilograms of rocks and soil during their six missions to the moon between 1969 and 1972 and brought it all back to Earth.
鈥淭he moon is the Rosetta Stone of the solar system,鈥 Lawrence, who works at the Johnson Space Center in Houston, said. 鈥淚t鈥檚 the cornerstone of planetary science.鈥
鈥淧eople don鈥檛 fully appreciate just how important studying the Apollo samples was for understanding the solar system and the universe around us.
鈥淢any of the discoveries that we鈥檝e made in planetary science, not just on the moon but on Mercury, on Mars, on some of the asteroids, directly relate to some of the results that we obtained during the Apollo missions.鈥
Studying Apollo rocks has given scientists an understanding of how the moon was created, roughly at the same time as Earth some 4.3 to 4.4 billion years ago.
Debris spent the next several hundred million years coalescing in Earth orbit into the moon we have today, explained Lawrence.
鈥淲e learned that the interior structure of the moon is like the Earth,鈥 he said. 鈥淚t has a crust, it has a mantle and it has a core.鈥 And while life evolved on Earth, 鈥渢he moon is lifeless,鈥 he said. Several moon rocks are on display at the Johnson Space Center.
Former US President Richard Nixon also gave moon rocks from Apollo 11 and Apollo 17 to all of the nations of the world, at the time 鈥 as a token of US goodwill.
But most of the moon rocks are kept at NASA鈥檚 Lunar Sample Laboratory in Houston. Another cache of samples is at White Sands, New Mexico.
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