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Les Johnson, welcome back to planetary radio, and congratulations on all the good things, so the good news that you've gotten in the last few weeks and what's coming up later this year mostly. I think you'll hear them in the conversation we recorded as the new year began. If there's anything that unites his writing and the work he does for NASA, it may be optimism and cheerful passion. Les is also a noted writer of science fiction and nonfiction science books. It was only days ago that the space agency gave Les and his team the go ahead for construction of solar cruiser, a sail with 17 times as much sail as NEA Scout. As you'll hear, we are nearing the launch of this asteroid explorer. We talked then about the Near Earth Asteroid or NEA Scout Mission, the nearly 100 square meter solar sail effort headed by Les at NASA's Marshall Space Flight Center in Alabama. We've also got a new collection of space art for you to explore. That's just part of what you'll find in The Downlink at planetary org. A new computer simulation that includes asteroid impact, solar flares and volcanic eruptions on thousands of simulated earth-like worlds indicates that we and all the other living things on this planet beat the odds, so good on us. Lastly, I read in The Downlink about the delicate balance required for the generation and evolution of life on earth and other earth-like planets. There's much more about this mission and many others at. Japan's Hayabusa2 returned a total of 5.4 grams or two tenths of an ounce of material from asteroid Ryugu, not bad considering the goal was just a 10th of a gram. Of course, much more than that amount will be needed before work could begin. Outgoing governor Wanda Vazquez Garced has set aside $8 million for repair or replacement of the big radio telescope. The Puerto Rican government is not giving up on the Arecibo Observatory. I suspect we'll talk about this in the January Space Policy edition, premiering on Friday, January 8. It's still not known if the incoming Biden administration will retain the council. Recent Planetary Radio Space Policy edition guest, Scott Pace, has returned to academia from his service as executive secretary of the U.S.
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There are a couple of space headlines worth mentioning that didn't quite make it into the New Year's Day edition of The Downlink, our free weekly newsletter. It's a terrific collection of science fact and fiction about what it will mean to be human when we become an interstellar species. We'll give away Les' book Solaris in this week's What's Up segment with Bruce. Les has returned for a wonderful conversation about this sail and even bigger ones in our future along with much more. I wish I could say it's as big as an American football field, but at nearly 1,700 square meters, solar cruiser would cover a third of that field, and it will fly before the middle of this decade according to Principal Investigator Les Johnson. I'm Mat Kaplan of The Planetary Society with more of the human adventure across our solar system and beyond. NASA green lights a gigantic solar sail, this week on Planetary Radio. Jupiter is nearly twice as dense as Saturn. What is the approximate ratio of the average density of Jupiter to the average density of Saturn? In other words, how many times denser is Jupiter than Saturn? Question from the 23 December space trivia contest: How many crewed launches to space were there in 2020? Be sure to include your name and mailing address. What is the approximate mass of the NEA Scout solar sail?Ĭomplete the contest entry form at or write to us at no later than Wednesday, January 13th at 8am Pacific Time. Planetary Radio: Sailing to an Asteroid on the Light of the SunĪ copy of Stellaris: People of the Stars, edited by Robert E.NASA Selects Heliophysics Missions of Opportunity.NEA Scout unfurls solar sail for full-scale test.