[JAXA:0535] JAXA Astronaut Soichi Noguchi Selected as a Member of ISS Expedition Crew

November 7, 2017 (JST)

JAXA Astronaut Soichi Noguchi Selected as a Member of ISS Expedition Crew

The Japan Aerospace Exploration Agency (JAXA), a national research and development agency, is delighted to announce today that JAXA astronaut Soichi Noguchi was selected as a crew member of the International Space Station (ISS) Expedition 62/63.

The ISS Expedition 62/63 will be the third spaceflight for Astronaut Noguchi. He was launched as a mission specialist (MS) aboard the Space Shuttle for its Return to Flight mission in July 2005 after selected as a JAXA astronaut in 1996, and also worked on board the ISS for 161 days as a flight engineer of the ISS Expedition 22/23 after launched as the first Japanese left-seater for the Soyuz spacecraft in December 2009.

- Period of stay in space: Approximately six months since around the end of 2019
- Mission: Activities as the ISS Flight Engineer, mainly consisting of maintenance of the ISS facilities including "Kibo", scientific experiments, and manipulation of the Mobile Servicing System (MSS)
- Project schedule: Training necessary for the long-duration stay on the ISS scheduled to begin at the end of November 2017


Appendix:
Appendix1: Brief Personal History of JAXA Astronaut Soichi Noguchi
http://global.jaxa.jp/press/2017/11/20171107_noguchi.html#app1

Appendix2: JAXA Astronauts' ISS Expeditions
http://global.jaxa.jp/press/2017/11/20171107_noguchi.html#app2

Appendix3: JAXA President's Comment on the Selection of JAXA Astronaut Soichi Noguchi As a Member of ISS Expedition Crew
http://global.jaxa.jp/press/2017/11/20171107_noguchi.html#app3

Appendix4: Aspiration of Astronaut Noguchi "Determination to Become Expedition Crew"
http://global.jaxa.jp/press/2017/11/20171107_noguchi.html#app4


URL:
http://global.jaxa.jp/press/2017/11/20171107_noguchi.html


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JPL News - Day in Review

DAY IN REVIEW Powering Saturn's Active Ocean Moon Heat from friction could power hydrothermal activity on Saturn's moon Enceladus for billions of years if the moon has a highly porous core, according to a new modeling study by European and U.S. researchers working on NASA's Cassini mission. The study, published today in the journal Nature Astronomy, helps resolve a question scientists have grappled with for a decade:Where does the energy to power the extraordinary geologic activity on Enceladus come from? Cassini found that Enceladus sprays towering, geyser-like jets of water vapor and icy particles, including simple organics, from warm fractures near its south pole. Additional investigation revealed the moon has a global ocean beneath its icy crust,from which the jets are venting into space. Multiple lines of evidence from Cassini indicate that hydrothermal activity -- hot water interacting chemically with rock -- is taking place on the seafloor. One of those lines was the detection of tiny rock grains inferred to be the product of hydrothermal chemistry taking place at temperatures of at least 194 degrees Fahrenheit (90 degrees Celsius). The amount of energy required to produce these temperatures is more than scientists think could be provided by decay of radioactive elements in the interior. "Where Enceladus gets the sustained power to remain active has always been a bit of a mystery, but we've now considered in greater detail how the structure and composition of the moon's rocky core could play a key role in generating the necessary energy," said the study's lead author, Gaël Choblet from the University of Nantes in France. Choblet and co-authors found that a loose, rocky core with 20 to 30 percent empty space would do the trick. Their simulations show that as Enceladus orbits Saturn, rocks in the porous core flex and rub together, generating heat. The loose interior also allows water from the ocean to percolate deep down, where it heats up, then rises, interacting chemically with the rocks. The models show this activity should be at a maximum at the moon's poles. Plumes of the warm, mineral-laden water gush from the seafloor and travel upward, thinning the moon's ice shell from beneath to only half a mile to 3 miles (1 to 5 kilometers) at the south pole. (The average global thickness of the ice is thought to be about 12 to 16 miles, or 20 to 25 kilometers.) And this same water is then expelled into space through fractures in the ice. The study is the first to explain several key characteristics of Enceladus observed by Cassini: the global ocean, internal heating, thinner ice at the south pole, and hydrothermal activity. It doesn't explain why the north and south poles are so different though. Unlike the tortured, geologically fresh landscape of the south, Enceladus' northern extremes are heavily cratered and ancient. The authors note that if the ice shell was slightly thinner in the south to begin with, it would lead to runaway heating there over time. The researchers estimate that, over time (between 25 and 250 million years), the entire volume of Enceladus' ocean passes through the moon's core. This is estimated to be an amount of water equal to two percent of the volume of Earth's oceans. Flexing of Enceladus' icy crust due to the tidal pull of Saturn had previously been considered as a heat source, but models showed this would not produce enough sustained power. The ocean in Enceladus would have frozen within 30 million years. Although past studies modeled how tidal friction could generate heat in the moon's core, they made simpler assumptions or simulated the moon in only two dimensions. The new study ramped up the complexity of the model and simulated Enceladus in 3-D. Although the Cassini science team had suspected for years that a porous core might play an important role in the mystery of Enceladus' warm interior, this study brings together several more recent lines of evidence in a very elegant way, according to NASA's Cassini Project Scientist Linda Spilker at theagency's Jet Propulsion Laboratory in Pasadena, California. "This powerful research makes use of newer details -- namely that the ocean is global and has hydrothermal activity -- that we just didn't have until the past couple of years. It's an insight that the mission needed time to build, one discovery upon another," she said. Launched in 1997, the Cassini spacecraft orbited Saturn from 2004 to 2017. Cassini made numerous dramatic discoveries, including the surprising activity on Enceladus and liquid methane seas on Saturn's largest moon, Titan. Cassini ended its journey with a dramatic plunge into Saturn's atmosphere on Sept. 15, 2017, returning unique science data until it lost contact with Earth. The Cassini-Huygens mission is a cooperative project of NASA, ESA (European Space Agency) and the Italian Space Agency. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington. JPL designed, developed and assembled the Cassini orbiter. More information about Cassini: https://www.nasa.gov/cassini https://saturn.jpl.nasa.gov

 

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