A source of carbon — a building block of life — is found on Jupiter's moon Europa

https://www.npr.org/2023/09/22/ [login to see] /carbon-jupiter-moon-europa
In an intriguing breakthrough, astronomers have concluded that carbon, an essential component of life on Earth, is also present within Europa, Jupiter's ice-covered moon that's believed to hold huge oceans of liquid salt water beneath its icy surface.

The findings come from analyzing images from NASA's James Webb Space Telescope, which found the carbon "likely originated in the subsurface ocean," according to a summary of two papers about the analysis.

"The discovery signals a potentially habitable environment in the ocean of Europa," according to the Webb telescope's website.