Co-founder of Google DeepMind and CEO of SpaceX amongst the 2,400 signatories of pledge to block lethal autonomous weapons.
Ian Sample Science editor.
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Category: space travel – Page 433
Throughout history, humans have shared an innate interest in exploration — to travel to new reaches of our planet, and even our universe.
Last month, I sailed with the Viking Orion for its maiden voyage in the Mediterranean. Traveling to new places served as a reminder of the deeply curious human nature that continues to inspire space exploration.
The ship is named after the prominent constellation and NASA’s Orion spacecraft — the first crewed capsule designed to carry astronauts beyond low Earth orbit. The name also honors retired NASA astronaut Anna Fisher, who was recognized as the ship’s “godmother” during the ship’s naming ceremony on June 14. The Orion spacecraft is the last project Fisher worked on before she retired in May 2017. [Photo Tour: All Aboard the Space-Themed Viking Orion Cruise Ship!].
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The nuclear power sector is seeing a resurgence in innovation, supported by new policies and emerging technologies. The general public and various governments are starting to grasp the value of nuclear power as an alternative, sustainable energy source. Unlike renewables, such as wind and solar power, nuclear energy is not dependent on weather conditions for power generation, having a capacity factor of over 90 percent. Nuclear power is also more eco-friendly than natural gas and coal and its “carbon-free” attributes are seen as critical in the fight against climate change.
For decades, advancements in the nuclear power sector have been incremental and focused largely on making systems “walk away safe.” Today, the industry is pushing the boundaries and exploring applications for nuclear power in ways that have never before been considered.
BWXT is at the forefront of this nuclear renaissance. This 6,000-employee company operates on the model of letting capital drive strategy. BWXT is constantly evaluating new ways to ensure workers, funding, and policies are utilized in the most effective way possible. The company also analyzes the needs of numerous other industries to determine how nuclear power could provide innovative solutions.
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In the new study, the researchers dropped the full experimental set up for photocatalysis down a 120m drop tower, creating an environment similar to microgravity. As objects accelerate towards Earth in free fall, the effect of gravity diminishes as forces exerted by gravity are cancelled out by equal and opposite forces due to the acceleration. This is opposite to the G forces experienced by astronauts and fighter pilots as they accelerate in their aircraft.
The researchers managed to show that it is indeed possible to split water in this environment. However, as water is split to create gas, bubbles form. Getting rid of bubbles from the catalyst material once formed is important – bubbles hinder the process of creating gas. On Earth, gravity makes the bubbles automatically float to the surface (the water near the surface is denser than the bubbles, which makes them buyonant) – freeing the space on the catalyst for the next bubble to be produced.
In zero gravity this is not possible and the bubble will remain on or near the catalyst. However, the scientists adjusted the shape of nanoscale features in the catalyst by creating pyramid-shaped zones where the bubble could easily disengage from the tip and float off into the medium.
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Based on NASA’s “schedule risk analysis” from April, the agency estimates that Boeing will reach this milestone sometime between May 1, 2019, and August 30, 2020. For SpaceX, the estimated range is August 1, 2019, and November 30, 2020.
Both of the companies are well behind schedule, forcing the agency to scramble.
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Space Exploration World News
Posted in space travel
Bucknell has led advanced engineering teams at Chrysler and General Motors for three production high performance engine families. Was Senior Propulsion Engineer for the Raptor full-flow staged combustion methalox rocket at Space Exploration Technologies then Senior Propulsion Scientist for Divergent3D developing vehicle technologies.
In 2017, he described how high temperature (820−1000 degree celsius) nuclear power plants can solve produce synthetic fuel to replace oil.
Molten Salt reactors are being developed in China, Canada and the USA. However, those plants will run at about 700 degree celsius.
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Today marks not one but two milestones in planetary exploration. It is the 25th anniversary of Voyager 2’s flight past Neptune, the most distant planet ever seen up close. It is also the exact day that the New Horizons spacecraft is crossing Neptune’s orbit on its way to Pluto, the mysterious world that marks the boundary between the solar system we know and the one we don’t.
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