NASA makes third attempt to partially fuel moon rocket in practice countdown
CBSN
NASA on Tuesday restarted a two-day dress rehearsal countdown for the agency's new Space Launch System moon rocket after a series of unrelated glitches, mostly involving ground systems, blocked two earlier attempts to fully fuel the huge launcher to verify its readiness for flight.
The lone rocket-related problem — trouble with a one-way helium pressurization valve in the booster's second stage — cannot be fixed at the launch pad, and engineers will be unable to pump supercold cryogenic propellants into the stage during fueling operations Thursday as originally planned.
Instead, the team will concentrate on loading the SLS core stage with 537,000 gallons of liquid hydrogen fuel and 196,000 gallons of liquid oxygen Thursday morning, testing their ability to monitor and control the flow of propellants, verifying control room commanding and validating software through two terminal countdown test runs.
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Washington — The world warmed to yet another monthly heat record in January, despite an abnormally chilly United States, a cooling La Nina and predictions of a slightly less hot 2025, according to the European climate service Copernicus.
Since ChatGPT was released just over two years ago, its use everywhere from the workplace to academia has expanded significantly. In schools across the country, teachers and administrators have been grappling with how to contend with this new tool. While some say it has benefits, others point out the negatives, like cheating.
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Red light therapy, also known as LED therapy, is gaining popularity in the skin care world for its potential anti-aging benefits.
Asteroid samples fetched by NASA hold not only the pristine building blocks for life but also the salty remains of an ancient water world, scientists reported Wednesday.
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