Improving Fidelity of Launch Vehicle Liftoff Acoustic Simulations

Abstract: Launch vehicles experience high acoustic loads during ignition and liftoff affected by the interaction of rocket plume generated acoustic waves with launch pad structures. Application of highly parallelized Computational Fluid Dynamics (CFD) analysis tools optimized for application on the NAS computer systems such as the Loci/CHEM program now enable simulation of time-accurate, turbulent, multi-species plume formation and interaction with launch pad geometry and capture the generation of acou...

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Our Human Journey to Mars – The Next Steps

Abstract: The United States National Aeronautics and Space Administration (NASA) will be launching the super-heavy-lift Space Launch System (SLS) by the end of the decade. This launch marks the next steps of human exploration of Mars and continues the journey that began over 50 years ago with Mariner and most recently ExoMars. SLS is the only rocket with the power capable of sending humans to deep space and the large systems necessary for human exploration all the way to Mars. Exploration Mission (EM)-...

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Exclusive: If Trump skews science, researchers must raise the alarm – Obama official

WASHINGTON (Reuters) - Scientists must confront climate change deniers and speak up if U.S. President-elect Donald Trump tries to sideline climate research, Interior Secretary Sally Jewell is due to say on Wednesday.

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Exclusive: If Trump skews science, researchers must raise the alarm – Obama official

WASHINGTON (Reuters) - Scientists must confront climate change deniers and speak up if U.S. President-elect Donald Trump tries to sideline climate research, Interior Secretary Sally Jewell is due to say on Wednesday.

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Image: HTV-6 cargo craft approaches space station

Expedition 50 Commander Shane Kimbrough of NASA shared this photograph of the Japan Aerospace Exploration Agency's Kounotori H-II Transfer Vehicle (HTV-6) as it approached the International Space Station on Dec. 12, 2016, writing, "Beautiful #HTV6 @Space_Station. @NASA and @ESA astronauts using @csa_asc robot arm to capture @JAXA_en spacecraft. Proud of Int'l. #Teamwork"

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State of the Arctic—longer melting seasons, thinning sea ice

The Arctic is warming twice as fast as the rest of the planet, and scientists are seeing the effects across ice and ecosystems. The average annual air temperature over Arctic land is now 3.5°C (6.5°F) warmer than it was 1900, Greenland is experiencing longer melting seasons, and this year's spring snow cover extent set a record low in the North American Arctic, according to the National Oceanic and Atmospheric Administration's newly released 2016 Arctic Report Card.

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