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New Lithium-Plasma Engine Passes Key Mars Propulsion Test

1 week 6 days ago
NASA engineers have tested a next-generation lithium-plasma electric propulsion system that reached 120 kilowatts, a new U.S. record and about 25 times the power of the electric thrusters on NASA's Psyche spacecraft. "Designing and building these thrusters over the last couple of years has been a long lead-up to this first test," said James Polk, who is a senior research scientist at NASA Jet Propulsion Laboratory. "It's a huge moment for us because we not only showed the thruster works, but we also hit the power levels we were targeting. And we know we have a good testbed to begin addressing the challenges to scaling up." Universe Today reports: While 120 kilowatts is a new record, NASA estimates it a future human mission to Mars will require 2 to 4 megawatts of power consisting of several thrusters and requiring more than 23,000 hours (958 days/2.6 years) of operation. To accomplish this, the thrusters would have to withstand more than 2,800 degrees Celsius (5,000 degrees Fahrenheit), which the thrusters achieved during testing. The reason for the extended operation is due to the estimated time of an entire human mission to Mars, which is estimated to be approximately 2.6 years. This is because the launch window to Mars only opens once every two years due to the orbital behaviors of both planets. While no mission has ever returned from the Red Planet, this same launch window works from Mars to Earth, too. When launched within this window, robotic spacecraft have traditionally taken approximately 6-7 months to reach Mars. However, a human mission would require a much larger spacecraft to accommodate the astronauts, food, fuel, water, and other mission-essential items. For the approximate 2.6-year mission, this would entail approximately 6-9 months traveling to Mars, followed by approximately 18 months on the surface of Mars until the next launch window opens, then another approximate 6-9 months back to Earth. However, having much less fuel due to the electric propulsion system could potentially alter this timeframe.

Read more of this story at Slashdot.

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Amazon Stuck With Months of Repairs After Drone Strikes On Data Centers

1 week 6 days ago
An anonymous reader quotes a report from Ars Technica: Amazon's cloud customers will need to wait several more months before the US tech company can repair war-damaged data centers and restore normal operations in the Middle East. The announcement comes two months after Iranian drone strikes targeted three Amazon data centers in the United Arab Emirates and Bahrain -- meaning that full recovery from the cloud disruption could take nearly half a year in all. The Amazon Web Services (AWS) dashboard posted an April 30 update describing how its UAE and Bahrain cloud regions "suffered damage as a result of the conflict in the Middle East" and are unable to support customer applications. The update also said that "relevant billing operations are currently suspended while we restore normal operations" in a process that "is expected to take several months." That wording suggests Amazon will continue to avoid billing AWS customers in the affected regions -- ME-CENTRAL-1 and ME-SOUTH-1 -- after it initially waived all usage-related charges for March 2026 at an estimated cost of $150 million. AWS also "strongly" recommended that customers migrate resources to other cloud regions and rely on remote backups to restore any "inaccessible resources." Some customers, such as the Dubai-based super app Careem—which offers ride-hailing, household services, and food and grocery delivery -- were able to get back online quickly after doing an overnight migration to other data center servers.

Read more of this story at Slashdot.

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