NASA’s Webb Finds Signs of Possible Aurorae on Isolated Brown Dwarf

NASA’s Webb Finds Signs of Possible Aurorae on Isolated Brown Dwarf

Handout photo - Astronomers used NASA’s James Webb Space Telescope to study 12 cold brown dwarfs. Two of them – W1935 and W2220 – appeared to be near twins of each other in composition, brightness, and temperature. However, W1935 showed emission from methane, as opposed to the anticipated absorption feature that was observed toward W2220. The team speculates that the methane emission may be due to processes generating aurorae. Astronomers using NASA’s James Webb Space Telescope found infrared emission from methane coming from W1935. This is an unexpected discovery because the brown dwarf is cold and lacks a host star; therefore, there is no obvious source of energy to heat its upper atmosphere and make the methane glow. The team speculates that the methane emission may be due to processes generating aurorae, shown here in red. Infrared emission from methane suggests atmospheric heating by auroral processes. These findings are being presented at the 243rd meeting of the American Astronomical Society in New Orl

Salt water moving up U.S. Mississippi River threatens drinking water supplies

STORY: Salt water moving up U.S. Mississippi River threatens drinking water supplies DATELINE: Oct. 2, 2023 LENGTH: 0:02:29 LOCATION: HOUSTON, U.S. CATEGORY: ENTERTAINMENT SHOTLIST: 1. various of the Mississippi River related footage STORYLINE: Salt water moving up the Mississippi River from the Gulf of Mexico is threatening drinking water supplies in and around New Orleans, the biggest city of U.S. state Louisiana, triggering a big concern of potential lead contamination. As of Friday afternoon, New Orleans' drinking water was safe, New Orleans Mayor LaToya Cantrell said in a news release. "We have been and will remain in daily, close coordination with local, regional and state agencies to actively monitor the salt water wedge moving up the Mississippi River," said Cantrell. "The most important thing for residents at this time is to stay informed and remain calm." The salt water intrusion has already tainted water systems in Plaquemines Parish and is now nearing various water intakes around the New Orl

Half & Half (SALLI RICHARDSON-WHITFIELD) and Soul Train (ORL

Half & Half (SALLI RICHARDSON-WHITFIELD) and Soul Train (ORL

Half & Half and Soul Train are two members of the Black Knights, a motorcycle racing club that is like an extended family in BIKER BOYZ.