Today, with NASA once again considering the challenges of sending astronauts to Mars, the nuclear option is back on the table as part of the agency's Game Changing Development program. Under this, NASA has awarded BMXT, which supplies nuclear fuel to the U.S. Navy, a $18.8-million contract running through September 30, 2019 to look into the possibility of developing a new engine using a new type of fuel. Unlike previous designs using highly enriched uranium, BMXT will study the use of Low-Enriched Uranium (LEU), which has less than 20 percent of fissile uranium 235. This will provide a number of advantages. Not only is it safer than the highly enriched fuel, but the security arrangements are less burdensome, and the handling regulations are the same as those of a university research reactor. If NASA determines next month that the LEU engine is feasible, the project will conduct testing and refine the manufacturing process of the Cermet fuel elements over the course of a year, with testing of the full-length Cermet fuel rods to be conducted at Marshall.
Slashdot reader Big Hairy Ian adds: "At the very least it looks much more feasible than Project Orion."
"Yeah, that was a tough decision," Musk acknowledged Wednesday with a sigh. "The reason we decided not to pursue that heavily is that it would have taken a tremendous amount of effort to qualify that for safety for crew transport," Musk explained Wednesday. "There was a time when I thought the Dragon approach to landing on Mars, where you've got a base heat shield and side mounted thrusters, would be the right way to land on Mars. But now I'm pretty confident that is not the right way." Musk added that his company has come up with a "far better" approach to landing on Mars that will be incorporated into the next iteration of the company's proposed Mars transportation hardware.
Several governors asked Musk how to regulate the emerging AI industry, to which he suggested learning as much as possible about artificial intelligence. Musk also warned that society won't know how to react "until people see robots going down the street killing people... I think by the time we are reactive in AI regulation, it's too late."
Dubbed "Chubby 5" for its huge size -- 5 meters in diameter and 57 meters tall -- the LM-5 rocket is designed to carry up to 25 tons of payload into low orbit, more than doubling the country's previous lift capability... The launch failure means further delay for a series of planned Chinese space endeavors -- including its robotic and eventual human lunar programs -- according to Joan Johnson-Freese, a professor at the US Naval War College and an expert on China's space program... China has announced plans to land a robotic probe on the dark side of the moon later this year and to reach Mars around 2020. All such future missions will depend on the LM-5 and space officials told reporters Sunday that the latest launch would help perfect the rocket design, including enabling it to send a space station into orbit "in a year or two."
This morning Elon Musk tweeted his condolences, adding "I know how painful that is to the people who designed & built it."
The object would be different from -- and much closer than -- the so-called Planet Nine, a planet whose existence has yet to be confirmed... "The most likely explanation for our results is that there is some unseen mass," says Kat Volk, a postdoctoral fellow at the University of Arizona's Lunar and Planetary Laboratory and lead author of the study in the Astronomical Journal. "According to our calculations, something as massive as Mars would be needed to cause the warp that we measured."
West called videogames "an ideal means to broaden the imaginations of young people," saying the medium "can expand our awareness of the world as it is, was, or might be. The medium is still in its infancy, but read this again in a few years and see if this prediction hasn't come true: as videogaming grows, we will grow."
My favorite story is how West was cast as Batman after the show's producer spotted his performance as super-spy Agent Q in a commercial for Nestle Quik. And CNN also remembers that "later in life, West made appearances on the animated series 'Family Guy' as Mayor Adam West, the oddball leader of Quahog, Rhode Island."
The rocks also show that the Red Planet's climate may have been more dynamic than we thought, going from cold and dry to warm and wet, before eventually drying out. We still don't know whether life once existed on Mars when the planet was warmer and had liquid water. But today's findings, published in Science, give a much more nuanced and detailed picture of what this area of Mars could have looked like through time... "The lake had all the right stuff for microbial life to live in," says study co-author Joel Hurowitz, a geochemist and planetary scientist at Stony Brook University.
NASA's Curiosity rover spent three and a half years collecting data from the crater, and that data now suggests that a habitable environment existed there for at least tens of thousands of years -- and possibly as long as "tens of millions of years."