... even evaluating the present, one must look in detail at the history of the space project. The missions that gave scientists and engineers the necessary data and experience to make new, safer, more reliable and intricate equipment were launched long before there was realistic talk of sending probes to Mars. The ... Mercury, an effort to learn if humans could survive in space. It was the prelude to the later missions, and it gave NASA the necessary data to build better, and more comfortable ships for humans to stay in space for extended periods of time. The first launch of the Mercury progr...

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• Has Bibliography
• Grade Level: High School

... to operate on another planetary surface. The Mars pathfinder sent photographs, atmospheric measurements, and a few other important data that will contribute to taking a man to Mars. While pathfinder sent data, Sojourner examined rocks and soil samples with a camera and Alpha Proton X-ray Spectrometer, providing useful data on chemical compositions and radiation bounced back from rocks and dust. The mission finally ended when the ... and creates water as well. A small amount of water is also carried onboard in case of emergencies. Water is also recycled on long duration missions aboard s...

• Word Count: 1792
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• Has Bibliography
• Grade Level: High School

... the free electron will want to unite with the hole again. The electron will then want flow back over to the positive side and it will cause current. The whole process done by the cell's electric field causes a voltage. When current and power are put together, power is produced (Cells 3). The arrays produce about 160 volts of DC electricity. The space ... . The two different ways the ISS has to talk is the S-band and Ku-band. S-band is used to send voice, commands, telemetry, and data files. Ku-band is used for video and transfer of two-way data files. We see Ku-band more often like being...

• Word Count: 1616
• Approx Pages: 6
• Grade Level: High School