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The lunar lander, Eagle, was divided into 2 sections. The bottom half, called the Descent Stage contained the fuel for descent and landing on the moon. It also contained most of the water and oxygen used on the moon by the astronauts. The top half, called the Ascent Stage, was the part that lifted off from the moon. The Ascent Stage also doubled as the astronaut's home while on the moon.

After achieving orbit, the commander, who, in the case of Apollo 11, was Neil Armstrong, docked with the Command/Service Module that orbited the Moon while the astronauts walked on the surface. The Apollo 11 CSM was manned by Michael Collins. After transferring all the lunar samples and astronauts into the CSM, the LM was jettisoned. The 3 men continued orbiting the moon for one more day. On the back side of the moon, Michael Collins told the onboard computer where they were in space and how long to fire the Service Module engine. After the 4 minute burn, the astronauts left lunar orbit and were on their way back to earth. The Service Module engine wasn't very big or powerful. It only needed to have enough power to get them out of lunar orbit and into the gravitational pull of the earth. Once under the influence of earth's gravity, they fell back to earth and landed in the Pacific Ocean after 8 days in space.

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11y ago

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