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Comments of the Week #172: From sodium-and-water to the most dangerous comet of all
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The Space Shuttle Engines Will Rise Again
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Roscosmos, NASA celebrate historic launch anniversaries while looking to the future
April 12, 2021
Today, Roscosmos is celebrating the 60th anniversary of the Vostok-1 mission, which launched Yuri Gagarin and the first human spaceflight, while NASA simultaneously commemorates the 40th anniversary of the first launch of the world’s first reusable spacecraft, when John Young and Bob Crippen embarked on the most ambitious test flight in history aboard the shuttle Columbia.
The anniversaries arrive at a crucial turning point in space exploration, as more and more emphasis shifts to the commercial development of the space industry as well as the establishment of multiple, sustainable destinations both in and beyond Earth orbit.
SLS, Stennis working on colder LOX for next Green Run WDR attempt
December 11, 2020
Space Launch System (SLS) Core Stage Green Run team members are working on new procedures to supply liquid oxygen (LOX) to the vehicle at lower temperatures in the next Wet Dress Rehearsal (WDR) attempt. The first attempt on December 7 at the Stennis Space Center in Mississippi was scrubbed because the temperature of the LOX was a few degrees higher than design requirements as it entered the vehicle; NASA did not want to continue loading with the temperature out of limits.
The problem is not with the Core Stage itself; engineers with the SLS Program, Core Stage prime contractor Boeing, and NASA Stennis are looking at ways to reduce the temperature of the cryogenic liquid before it reaches the stage from barges docked next to the B-2 Test Stand. In the meantime, the test team is recycling the stage and other equipment to be ready to start a new Wet Dress Rehearsal attempt no earlier than the week of