9P/Tempel 1 Archives

Images of comet 7P/Pons–Winnecke taken during a period of quiescence (left, taken at 2021 July 28 10:25:23 UTC) and the 2021 July 10 outburst (right, taken at 2021 July 10 02:29:58 UTC). The outburst ejecta is apparent as distortions in the observed surface brightness as compared to the ambient coma image. The bottom row shows the logarithmically scaled data with contours spaced every 0.5 mag/arcsec2 . A color bar provides the surface brightness scale. Images are oriented with north up, and east to the left. -⊙ represents the anti-solar direction and V is the heliocentric velocity direction, and a linear scale bar is shown. The blue arrows highlight two linear features as a result of the ejecta distribution that are meeting at a near-right angle in front of the nucleus. -- astro-ph.EP

A Look At Eight Outbursts Of Comet 7P/Pons-Winnecke

by Keith CowingJune 26, 2026June 26, 2026

Cometary outbursts may be used as a means to infer the physical processes occurring on cometary nuclei. To that end, we studied eight outbursts of comet 7P/Pons-Winnecke identified between 2021 […]

Surface electrostatic maps of adenylate kinase (Adk), β-galactosidase (β-Gal), DNA ligase (LigA), glycerol kinase (GlpK), histidinol-phosphate aminotransferase (HisC), malate dehydrogenase (MDH) and signal recognition particle 54 (SRP54) are shown for Escherichia coli (mesophile), Psychromonas ingrahamii (psychrophile), Haloferax volcanii (halophile), and Halorubrum lacusprofundi (psychrohalophile). Electrostatic potentials were calculated from predicted structures and mapped onto the molecular surface. Blue indicates positive electrostatic potential and red indicates negative electrostatic potential. -- Frontiers in Microbiology

Cryobiology

Coordinated Proteome-scale Remodeling Underlies Polyextremophilic Survival In Antarctic Cryo-hypersaline Brines

by Keith CowingJune 24, 2026June 24, 2026

Introduction – Cryo-hypersaline brines combine sub-zero temperatures with near-saturated salinity, creating one of Earth’s most extreme habitats. Antarctic Deep Lake provides a natural model for studying how proteins remain stable […]