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“Here’s some of the stories trending This
Week at NASA!”

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Engineers at Kennedy Space Center have finished
installing the Orion spacecraft’s backshell

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– the black protective tiles on the cone-shaped
sides of NASA’s new deep space capsule.

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The backshell tiles are the same type that
protected the underside of space shuttles

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-- and will not only provide protection from
debris while in space but from extreme temperatures

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in that area of the spacecraft as it returns
from space – which could exceed 31-hundred

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degrees Fahrenheit.

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Anti-geyser testing is underway at Marshall
Space Flight Center to make sure the liquid

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oxygen tank feed system of NASA’s Space
Launch System rocket doesn’t spring a leak.

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Geysering can happen if gas bubbles displace
the liquid in the system.

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Engineers are using a full-scale replica of
the system, set up on one of Marshall's test

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stands to test procedures to prevent geysering.

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The Space Launch System rocket.

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-- will make deep space missions possible,
including to an asteroid and ultimately to

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Mars.

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A replica of the James Webb Space Telescope’s
backplane or “central backbone” arrived

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recently at Goddard Space Flight Center, where
engineers and scientists will use it to practice

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the delicate procedure of installing the observatory’s
mirrors before the actual backplane arrives.

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Targeted for launch in 2018, the JWST is the
world's next-generation space observatory

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and successor to NASA's Hubble Space Telescope.

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A new NASA airborne campaign this summer will
study the effect of sea ice retreat on Arctic

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climate.

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ARISE, The Arctic Radiation IceBridge Sea
and Ice Experiment is NASA's first airborne

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investigation designed to take simultaneous
measurements of ice, clouds and radiation

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levels in the Arctic, to help determine the
degree of climate warming.

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Flights are scheduled August 28 through October
1 -- the peak of summer sea ice melt.

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During an August 20 event at NASA headquarters,
called Ancient Earth, Alien Earths, a panel

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of scientists from NASA and other organizations
discussed how vastly different and inhospitable

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we all would find ancient Earth, if we could
go back in time.

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Despite the conditions, though, it was an
environment in which life began and evolved

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– and understanding how that was possible
could help us recognize habitable planets

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around other stars.

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During a 5- hour, 11-minute spacewalk outside
the International Space Station on August

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18, Expedition 40 Flight Engineers Alexander
Skvortsov and Oleg Artemyev of the Russian

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Federal Space Agency deployed a nanosatellite
and completed work on other science hardware

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and experiments on the Russian segment of
the ISS.

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It was the 181st spacewalk in support of space
station assembly and maintenance.

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And that’s what’s up this week @NASA …