Lunar radiation study points to better shielding techniques

I mentioned in this item about measurements of radiation exposure for trips to Mars, the best shielding for your spaceship is with materials that contain lots of hydrogen. A new study of rad measurements on NASA’s Lunar Reconnaissance Orbiter (LRO) bears this out: Moon Radiation Findings May Reduce Health Risks to Astronauts – Univ. of New Hampshire

Says Zeitlin, “This is the first study using observations from space to confirm what has been thought for some time – that plastics and other lightweight materials are pound-for-pound more effective for shielding against cosmic radiation than aluminum. Shielding can’t entirely solve the radiation exposure problem in deep space, but there are clear differences in effectiveness of different materials.”

The plastic-aluminum comparison was made in earlier ground-based tests using beams of heavy particles to simulate cosmic rays. “The shielding effectiveness of the plastic in space is very much in line with what we discovered from the beam experiments, so we’ve gained a lot of confidence in the conclusions we drew from that work,” says Zeitlin. “Anything with high hydrogen content, including water, would work well.”

Exoplanet search stretch goal for Planetary Resources Arkyd telescope Kickstarter

The Planetary Resources crowd-funding campaign for the ARKYD Space Telescope has reached 9,558 Backers, $858,127 pledged of $1,000,000 goal with 19 days to go. To boost pledges far beyond that goal they have posted an ambitious Stretch Goal:

Planetary Resources Needs YOUR Help to Hunt for Alien Planets

Asteroid mining company announces new crowdfunding goal to enhance
the ARKYD telescope with capability to search for alien planets around distant stars

Bellevue, Washington – June 11, 2013 – Alien planets are out there and Planetary Resources needs your help to find them! That’s right, the same high-powered telescope technology being used by Planetary Resources to identify near-Earth asteroids can also be used to hunt for what scientists call extrasolar planets or “exoplanets” – which are very much alien worlds. For the first-time ever, this capability will be placed directly into the hands of students, researchers and citizen scientists.

Planetary Resources recently launched a campaign on Kickstarter for the ARKYD – the world’s first crowdfunded space telescope accessible to the public. In only 13 days, the company has already reached well over 85 percent of its original US$1 million goal. Today, the company is announcing that if the total amount pledged exceeds US$2 million in the 19 days remaining in the campaign, it will invest the additional funds to enhance the ARKYD space telescope technology to enable it to search for alien planets!

Visit Planetary Resources’ Kickstarter Page to Pledge Your Support: http://bit.ly/ARKYD-100

These upgrades would add exoplanet transit detection capability by enhancing the telescope’s stability systems and dedicating time to monitor candidate star systems.  A special bonus is that this upgrade would also allow for better measurement of the spin-properties of asteroids, using the same technique.  “While the ARKYD won’t rival NASA’s US$600 million Kepler spacecraft, which may have to end its mission due to a recent equipment failure, the enhanced ARKYD will be a huge step toward important new scientific discoveries enabled by citizen scientists,” said Chris Lewicki, President and Chief Engineer, Planetary Resources, Inc.

The company is partnered with one of the world’s leading exoplanet scientists, Sara Seager, Ph.D. of the Massachusetts Institute of Technology (MIT). Dr. Seager, Professor of Physics and Planetary Science at MIT stated, “We’re excited about this game-changing approach that could transform how we do science in the future.  It’s not just about advanced technology in a small satellite, but a crowdfunded approach to space science that could be revolutionary. The enhanced version of the ARKYD telescope will be an important source of data for exoplanets that can only be obtained from space, above the blurring effects of Earth’s turbulent atmosphere.”

Peter H. Diamandis, M.D., Planetary Resources Co-Founder and Co-Chairman said, “We’re confident this campaign will exceed the original goal of US$1 million dollars. We’re now focusing on enhancing the capabilities of the telescope and creating meaningful and epic crowd involvement.” He continued, “We’re a hardware and inspiration company, and we’re thrilled to provide a new generation of space pioneers with the ability to take a hands-on approach to exploration.”

To date, more than 9,400 people from around the globe have pledged their support for the ARKYD.  Over 8,000 have requested their very own #SpaceSelfie, another 900 people have donated time on the ARKYD to education and many others are looking to gain access to the telescope to explore the cosmos on their own!

Planetary Resources, Inc. was founded in 2009 by Eric Anderson and Dr. Peter H. Diamandis. Our vision is to establish a new paradigm for resource utilization that will bring the Solar System within humanity’s economic sphere of influence. The company will conduct low-cost robotic space exploration beginning with the Arkyd Series of space missions that will identify the most commercially viable near-Earth asteroids. These initial missions will assist the company in enabling the retrieval of raw materials from these select asteroids, including water, precious metals and more.

Planetary Resources is financed by industry-launching visionaries, three of whom include Google’s CEO Larry Page & Executive Chairman Eric Schmidt; and Ross Perot, Jr., Chairman of Hillwood and The Perot Group; who are committed to expanding the world’s resource base so humanity can continue to grow and prosper for centuries to come. Some of the company’s partners and advisors include the Bechtel Corporation; film maker and explorer James Cameron; former Chief of Staff, United States Air Force General T. Michael Moseley (Ret.); and Sara Seager, Ph.D., Professor of Planetary Science and Physics at MIT. Members of the company’s technical staff have worked on every recent U.S. Mars lander including Spirit, Opportunity and Curiosity, and include other key non-aerospace and safety-critical disciplines. For more information, please visit www.planetaryresources.com.

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Space policy roundup – June.11.13

Links to some recent space policy related items:

Update: Here’s another item of interest: The National Academies wants you(r thoughts) – Space Politics

Everyone can participate in space