37186402
Description
Flashcards by Andrea Pan, updated more than 1 year ago
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Created by Andrea Pan
almost 2 years ago
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| Question | Answer |
| Why are no stars visible in the photos? | The reason is that the brightness of the stars is so faint that they did not impress the photographic film. |
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Why doesn't the 17-ton module leave a deep crater in the lunar surface?
Image:
Nasa (binary/octet-stream)
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On the Moon, gravity is equivalent to one-sixth that of the Earth, so the weight of the lunar module was one-sixth that of the Earth; just under 3 tons, equivalent to two automobiles- |
| The American flag flies, when on the Moon there is no wind, but emptiness. | NASA, aware that the flag would not be able to fly in vacuum conditions, placed a bracket at the top of the flag so that it would remain upright. In addition, the material from which it was made was designed to give the impression that it was waving. |
| The lunar module's engines did not expel flames. | This is because the fuel used was monomethylhydrazine, a fuel that does not need oxygen -we must not forget that in space there is no oxygen- for combustion. In fact, a fuel that needed oxygen to react could not have been used in space. |
| Why is no suspended dust observed on the Moon, if the gravity is much lower than on Earth? | The absence of atmosphere on the Moon makes the formation of air currents impossible, as well as making it impossible to support any type of dust or particles. |
| Astronauts' footprints | It is due to the physical-chemical nature of the layer of minerals that covers the entire surface of the Moon, called regolith. It is composed of materials of different sizes and due to the weak gravitational attraction it is very susceptible to be imprinted by any kind of pressure. |
| The shadows of some photos should be parallel and diverge at 90º. | The photos they refer to are enlargements or cutouts of panoramic photos like the one in this flashcard. Moreover, in this case, they are of the same astronaut at two different times. |
| The videos were recorded on Earth and slowed to half speed to simulate the lack of gravity. | You only have to play these videos at double the speed to see that the movement is unnatural. |
| The Rover was too large to be transported in the lunar module. | The Rover was folded and attached to the surface of the module, and then, like a telescope or a fishing rod, it acquired its functional form. |
| Why didn't the Rover's tires explode? | These were made of zinc and aluminum, and were coated with several layers of steel. They also had a very special design. In this picture you can see some of the prototypes under development. |
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