NASA Gets Confident, Shrinks Mars Rover's Landing Bullseye

A narrower landing zone means that Curiosity will touch down closer to science objectives, but closer to dangerous terrain as well

2 min read
NASA Gets Confident, Shrinks Mars Rover's Landing Bullseye

NASA, citing "increased confidence" in the ability of its Mars Science Laboratory rover to make a precision landing, has decided to retarget the craft's landing zone to a much smaller area, closer to both its science objective and some dangerous obstacles.

The above pic shows how the landing target for the rover, also known as Curiosity, has been changed: from an ellipse 20 kilometers by 25 kilometers, the new target is just 7 kilometers by 20 kilometers. Here's another view:

These ellipses represent the target areas in which Curiosity, using a "jet pack" and rappelling down cables in what NASA calls the "sky crane" maneuver, will attempt to land. The center of each ellipse is where the rover will touch down if everything goes perfectly, but the perimeters designate the possible landing zone if everything goes not perfectly but normally, and accounts for atmospheric randomness and things like that. The larger ellipse in this picture, the original landing zone, is already smaller than any previous landing zone used for any other mission, but NASA believes that it can safely shrink it down.

The benefit of the smaller target zone is that, if everything goes well, MSL will land significantly closer to that big mountain in the pics (technically an uplift structure at the center of Gale Crater) called Mount Sharp. This could cut months off of the rover's trip to the mountain, where it'll be searching for evidence of environments favorable for microbial life.

With benefit comes risk, however, and the risk is that this new landing zone is close enough to the steep slopes of Mount Sharp that a miscalculation could lead to Curiosity being dropped into a hazardous area and not surviving the landing process. Remember, this is the "sky crane" landing process:

Yep, not especially friendly to mountainous slopes. We'll be holding our breath, keeping our fingers crossed, munching on peanuts, and praying to Ares all at the same time come August 5th. 

Via [ NASA ]

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The Bionic-Hand Arms Race

The prosthetics industry is too focused on high-tech limbs that are complicated, costly, and often impractical

12 min read
A photograph of a young woman with brown eyes and neck length hair dyed rose gold sits at a white table. In one hand she holds a carbon fiber robotic arm and hand. Her other arm ends near her elbow. Her short sleeve shirt has a pattern on it of illustrated hands.

The author, Britt Young, holding her Ottobock bebionic bionic arm.

Gabriela Hasbun. Makeup: Maria Nguyen for MAC cosmetics; Hair: Joan Laqui for Living Proof

In Jules Verne’s 1865 novel From the Earth to the Moon, members of the fictitious Baltimore Gun Club, all disabled Civil War veterans, restlessly search for a new enemy to conquer. They had spent the war innovating new, deadlier weaponry. By the war’s end, with “not quite one arm between four persons, and exactly two legs between six,” these self-taught amputee-weaponsmiths decide to repurpose their skills toward a new projectile: a rocket ship.

The story of the Baltimore Gun Club propelling themselves to the moon is about the extraordinary masculine power of the veteran, who doesn’t simply “overcome” his disability; he derives power and ambition from it. Their “crutches, wooden legs, artificial arms, steel hooks, caoutchouc [rubber] jaws, silver craniums [and] platinum noses” don’t play leading roles in their personalities—they are merely tools on their bodies. These piecemeal men are unlikely crusaders of invention with an even more unlikely mission. And yet who better to design the next great leap in technology than men remade by technology themselves?

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