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1

This type of antenna is known as a phased array, typically a group of similar smaller antennas arranged side by side. The electrical signal feed to the array includes delay elements and sometimes attenuation elements to "weight" the signal fed to or from the antenna elements that combine to form a narrow beam. Modern phased arrays are often used in RADAR or ...


3

As noted in the answer by Michael, a precise chemical composition is not known at this time. We can, however, consider the overall mineral composition on the surface of the Gale Crater. This diagram provided by Curiosity's CheMin analyzer (source) shows that the composition varies with depth inside the crater: The lower part of the crater contains large ...


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Mudstone, although the precise chemical composition is unknown at this time (at least to the extent I was able to find it out). From the Planetary Society, it is identified as being mudstone. Unfortunately, from wikipedia, it is clear that mudstone is a very general type of mineral and can be composed of many different things, as long as it was once ...


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Those dark objects are the deployment bags which contained the main parachutes prior to inflation. Source: The Apollo Parachute Landing System Also from Apollo 15 Main Parachute Failure Anomaly Report Two 16.5-foot diameter conical ribbon~type drogue parachutes are mortar-deployed 1.6 seconds after forward heat shield jettison. The drogue parachutes ...


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