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Hubble makes an exoplanet discovery …

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The next space station crew gets ready to
launch …

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And back to work in Florida after weathering
the storm … a few of the stories to tell

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you about – This Week at NASA!

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Researchers using data from our Hubble Space
Telescope have, for the first time, detected

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water vapor signatures in the atmosphere of
a planet outside our solar system that resides

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in the "habitable zone."

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This is the region around a star in which
liquid water could potentially pool on the

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surface of a rocky planet.

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The planet – known as K2-18b, orbits a small
red dwarf star about 110 light-years from

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us, in the constellation Leo.

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If confirmed by further studies, this will
be the only exoplanet known to have both water

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in its atmosphere and temperatures that could
sustain liquid water on a rocky surface.

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The next crew headed to the International
Space Station, including our Jessica Meir,

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wrapped up activities at the Gagarin Cosmonaut
Training Center outside Moscow on Sept. 10.

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Meir and her crewmates – Oleg Skripochka
of Roscosmos, and Spaceflight Participant

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Hazzaa Ali Almansoori – then departed for
the Baikonur Cosmodrome launch site in Kazakhstan

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to complete their training.

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The trio is scheduled to launch to the station
on Sept. 25.

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On Sept. 10 at our Kennedy Space Center in
Florida, the mobile launcher for our Artemis

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missions to the Moon began the 4-mile ride
atop crawler-transporter 2 back to Launch

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Pad 39B – after being housed for more than
a week inside the Vehicle Assembly Building

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due to Hurricane Dorian.

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With the mobile launcher back in place at
the pad, teams can resume validation and verification

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testing for our Artemis I mission – which
they plan to complete in the coming weeks.

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Artemis I will be the first integrated uncrewed
test flight of our Orion spacecraft, Space

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Launch System or SLS rocket and the ground
systems at Kennedy Space Center.

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Meanwhile, progress toward the launch pad
for Artemis I continues for our SLS rocket

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and Orion spacecraft.

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SLS and Orion have moved from design and manufacturing,
to testing and assembly and integration – some

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of the hardware has even been delivered to
the launch pad at Kennedy.

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A new online animated video shows a breakdown
of the parts that will make up the completed

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flight hardware for the mission.

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Check it out at go.nasa.gov/artemis1progress.

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Along with the Gateway in lunar orbit and
a new human landing system, SLS and Orion

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create the backbone for our Artemis missions
that will land astronauts on the Moon by 2024.

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Radar data from our Cassini spacecraft were
used in recently published research that suggests

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explosions of warming liquid nitrogen are
responsible for the steep-rimmed craters encircling

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some of the methane-filled lakes on Saturn’s
moon Titan.

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Most existing models that lay out the origin
of Titan's lakes point to a process that does

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not produce steep rims.

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Titan and Earth are the only planetary bodies
in our solar system known to have stable surface

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liquids – water on Earth and methane and
ethane on Titan — hydrocarbons that we think

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of as gases, but that behave as liquids in
Titan's frigid climate.

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The radar data were gathered during Cassini’s
last close flyby of Titan, as the spacecraft

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prepared for its final plunge into Saturn's
atmosphere two years ago.

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That’s what’s up this week @NASA …