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An update on the Green Run hot fire test for
Artemis I …

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A commercial cargo spacecraft leaves the space
station …

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And innovative ideas for exploring unexplored
areas of the Moon … a few of the stories

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to tell you about – This Week at NASA!

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The Green Run hot fire test with the Space
Launch System or SLS rocket’s core stage

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for our Artemis I mission, is now targeted
for as early as Jan. 17. The hot fire is the

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eighth and final scheduled test of the Green
Run series and will see all four of the rocket’s

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engines fired to simulate a launch. We conducted
the seventh test of the series – the wet

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dress rehearsal - on Dec. 20. During that
test the core stage tanks were loaded with

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more than 700,000 gallons of supercold propellant
for the first time, and then drained. SLS

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will launch an uncrewed Orion spacecraft on
a mission around the Moon on Artemis I.

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A Northrop Grumman Cygnus cargo spacecraft
left the International Space Station on Jan.

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6 – more than three months after delivering
nearly 8,000 pounds of supplies, scientific

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investigations, and other cargo to the orbiting
outpost. The Cygnus is named in memory of

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Kalpana Chawla a member of the STS-107 crew
that was lost in the space shuttle Columbia

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accident.

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During a virtual forum Jan. 6-7, university
teams selected as finalists in NASA’s Breakthrough,

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Innovative and Game-changing or (BIG) Idea
Challenge, presented innovative concepts for

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lunar payloads that could help NASA explore
previously uncharted areas on the Moon. Some

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of these concepts could help our Artemis lunar
exploration program study the Moon ahead of

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a human landing and help establish a sustained
presence on the lunar surface.

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Researchers at our Kennedy Space Center recently
tested a new robotic CubeRover inside a massive

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bin of regolith rock and dust used to simulate
the lunar surface. The shoebox-size rover

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built by Astrobotic Technology was funded
by a NASA program that encourages commercial

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development of innovative technologies to
fulfill agency needs. As is the case with

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small satellites, the rover’s standard size
enables researchers and students to build

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and launch them on NASA missions designed
to expand science, exploration, and commercial

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activity on the Moon.

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NASA contributions to two recently approved
heliophysics missions will help us understand

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the Sun and Earth as an interconnected system.
One is an international mission targeted for

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launch in 2026 that will use a next-generation
solar-observing telescope to study how solar

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wind and material is released from the sun’s
atmosphere. The other mission will use a trio

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of small satellites to study electric currents
in Earth’s atmosphere linking aurora to

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the Earth’s magnetosphere. That mission
will launch no earlier than June 2024.

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Data from our Solar Dynamics Observatory have
led to new results about the workings of sunquakes

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- seismic activity seen as ripples on the
Sun following a solar flare. Scientists have

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long suspected that sunquakes are driven by
magnetic forces or heating of the outer atmosphere,

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where solar flares occur. But data captured
by SDO in 2011 saw surface ripples of a sunquake

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emerging from deep beneath the solar surface,
right after a flare occurred. Scientists now

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think that sunquake ripples are driven by
a submerged source which is somehow triggered

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by solar flares in the atmosphere above.

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That’s what’s up this week @NASA …