Yazılar

Russian Spacecraft Odor Forces Brief Lockdown on ISS Module

/in /tarafından

A recent incident on the International Space Station (ISS) prompted Russian cosmonauts to briefly seal off part of the station after detecting an “unusual odor” emanating from the Russian Progress 90 cargo spacecraft. This occurred over the weekend, with NASA reporting the situation on Sunday.

According to NASA, the smell, accompanied by “droplets” observed by the cosmonauts, was likely due to “outgassing” from materials inside the Progress capsule. NASA clarified that the issue was not related to the spacecraft’s fuel—unsymmetric-dimethylhydrazine and nitrogen tetroxide—which is highly toxic to humans. Instead, it stemmed from materials within the spacecraft that had been exposed to the harsh conditions of space.

Kelly O. Humphries, NASA’s news chief at Johnson Space Center, reassured that there were no immediate safety concerns for the crew. “Outgassing” is a common occurrence in space when materials release gases in the absence of Earth’s atmosphere, and the extreme temperatures and radiation of space exacerbate this effect.

Once the unusual odor was detected, the cosmonauts quickly shut the hatch connecting the Poisk module to the rest of the ISS. Ground control teams then activated air scrubbers as part of standard protocol, which helped clear the air inside the station. NASA confirmed that air quality remained normal and that cargo transfer operations continued as planned.

The uncrewed Progress 90 spacecraft, which arrived on November 21 from the Baikonur Cosmodrome in Kazakhstan, was carrying essential supplies including food, fuel, and scientific materials. Despite the odor-related setback, the cosmonauts were able to access the cargo without further delay.

This event adds to ongoing concerns about the Russian-controlled modules on the ISS, including the Zvezda module, which has been largely sealed due to a slow air leak. The ISS continues to operate as a joint venture between Russia, the United States, and several international space agencies, though Russia’s commitment beyond 2028 remains uncertain.

xAI Faces Allegations of Escalating Memphis Smog with Unpermitted Gas Turbines

/in , /tarafından

Elon Musk’s artificial intelligence venture, xAI, is under scrutiny for exacerbating air pollution in Memphis, Tennessee, due to the use of unlicensed natural gas turbines at its newly established data center. Environmental and health advocates have raised concerns about the facility’s impact on local air quality, citing the turbines’ emission of nitrogen oxides (NOx), which contribute to the region’s smog issues.

Opened in June within a former Electrolux factory, xAI’s data center has been utilizing at least 18 gas turbines to power its operations, despite lacking the necessary permits. The Southern Environmental Law Center, representing various local groups, has requested an investigation from the Shelby County Health Department and the Environmental Protection Agency. They highlight the turbines’ role in adding to Memphis’s persistent smog problem, which has earned the area an “F” grade from the American Lung Association.

While xAI plans to transition to power supplied by Memphis Light, Gas and Water (MLGW) and the Tennessee Valley Authority, the utility has only begun providing part of the required 150 megawatts of power. This transition includes infrastructure upgrades to accommodate the increased demand.

Musk, who also leads Tesla and SpaceX, launched xAI in 2023 to develop AI technologies intended to rival those from major players like Google and Microsoft. The company’s data center requires substantial power for its AI models, including the new chatbot Grok.

The turbines, some visible from public roads, are said to emit significant levels of NOx, which can irritate respiratory systems and lead to serious health problems. Permits for such equipment are typically mandated in Tennessee to regulate emissions and ensure environmental safety. However, xAI’s turbines, with a combined capacity to emit 130 tons of NOx annually, have reportedly not been subjected to these regulatory measures.

Advocates express frustration over the lack of transparency and public input regarding the xAI project, emphasizing its already substantial environmental and health impacts. This situation follows a pattern of Musk-led ventures facing similar regulatory issues, including SpaceX’s unpermitted wastewater discharges and The Boring Co.’s unauthorized wastewater releases.