## Astronauts Fix Phantom Space Station Ammonia Leak54

astroengine writes "During an unscheduled spacewalk on the space station's exterior on Saturday morning, NASA astronauts Tom Marshburn and Chris Cassidy carried out the mother of all plumbing jobs: They detached a suspect ammonia pump, replaced it with a spare and watched for any further ammonia leakage. The emergency spacewalk was carried out in response to a troubling ammonia coolant leak that was discovered on Thursday. The coolant is used to maintain the temperature of the vast solar arrays the space station uses to generate electricity for its systems. 'It will take some diagnostics, still, over the course of the next several days by the thermal systems specialists to fully determine that we have solved the problem of the ammonia leak," said NASA commentator Rob Navias during the live NASA TV spacewalk broadcast. 'But so far, so "good."'"

## CO2 Levels Reach 400ppm at Mauna Loa For First Time On Record497

Titus Andronicus writes "Today, NOAA reported, 'On May 9, the daily mean concentration of carbon dioxide in the atmosphere of Mauna Loa, Hawaii, surpassed 400 parts per million for the first time since measurements began in 1958.' For comparison, over the last 800,000 years, CO2 has ranged from roughly 180 ppm to 280 ppm. 'For the entire period of human civilization, roughly 8,000 years, the carbon dioxide level was relatively stable near that upper bound. But the burning of fossil fuels has caused a 41 percent increase in the heat-trapping gas since the Industrial Revolution, a mere geological instant, and scientists say the climate is beginning to react, though they expect far larger changes in the future.' The last time Earth had 400 ppm was probably more than 3 megayears ago."

## Nearest Alien Planet Gets New Name185

SchrodingerZ writes "The nearest planet outside our solar system has recently been named Albertus Alauda. Originally named Alpha Centauri Bb, the planet is the closest known planet not orbiting the Sun, being a mere 4.3 light years away. The name comes from Jay Lark, who won the naming contest held by Uwingu starting last month and ending on April 22. Lark remarks that the name comes from the Latin name of his late grandfather, stating, "My grandfather passed away after a lengthy and valiant battle with cancer; his name in Latin means noble or bright and to praise or extol." The competition for naming the planet came from Uwing, a company which used the buying of name proposals and votes to fund grants for future space exploration ventures. Albertus Alauda won the competition with 751 votes, followed by Rakhat with 684 votes, and Caleo, with 622 votes."