Dense filaments of gas in the IC5146 interstellar cloud.
Image credits: ESA/Herschel/SPIRE/PACS/D. Arzoumanian (CEA Saclay).
ESAs Herschel space observatory has revealed that nearby interstellar clouds contain networks of tangled gaseous filaments. Intriguingly, each filament is approximately the same width, hinting that they may result from interstellar sonic booms throughout our Galaxy. (read more)