The spiraling vortex pictured here sits within an even more dramatic feature — a giant hexagonal cloud structure, some 25,000 kilometers across, that has persisted for decades over the north pole. (scientificamerican.com)
«Up until now, there have been no quantitative calculations of spectra for cloud structures and compositions that matched the observed spectrum of an actual storm cloud feature,» says Sromovsky. (sciencedaily.com)
Williams, of Cardiff University, explains: «We've known for some time that dusty, filamentary cloud structures are ubiquitous in the Milky Way's interstellar medium. (sciencedaily.com)