September 2023 – Page 10 – My WordPress Site

Astrochemistry, Astrogeology, Biosignatures & Paleobiology, Comets and Asteroids, Meteorites & Asteroids, Missions & Hardware, Planetary Protection & Biosafety

NASA Completes Last OSIRIS-REx Test Before Asteroid Sample Delivery

by Keith CowingSeptember 5, 2023September 5, 2023

Microgravity, Space Life Science, Space Physiology & Medicine, Space Stations, SPACELINE Current Awareness List

NASA Spaceline Current Awareness List #1,064 1 September 2023 (Space Life Science Research Results)

by Keith CowingSeptember 1, 2023February 16, 2024

PSF-subtracted JWST/NIRCam (left) and MIRI (right) images of the β Pic system (arbitrary color stretch). Five background sources were identified based on their NIRCam colors or morphology whose positions are highlighted in both images with red circles. The orange circles in the NIRCam image show the source positions rotated by the telescope roll angle, where negative ADI residuals are visible. BG4 appears to be the only source which is also visible in the MIRI image. The MIRI image was adapted from Rebollido et al. (2024). -- astro-ph.EP

Astronomy & Telescopes, Biosignatures & Paleobiology, SETI & Technosignatures

Report: Data-Driven Approaches to Searches for the Technosignatures of Advanced Civilizations

by Keith CowingSeptember 1, 2023September 1, 2023

Evolution of replicator populations in system A made from equimolar amounts of 1 and 2 (1.0 mM total concentration in 25 mM B2O3-buffer, pH 8.18) in a replication-destruction regime, implemented by serial transfer. The first generation was prepared as shown in Table S1, stirred for 4 days (1200 rpm; 45 oC) and analysed by UPLC-MS. A small aliquot (10%) of each DCL was transferred to a fresh solution of 1 and 2 (oxidized to 50% disulfides) that was then also stirred for 4 days (1200 rpm; 45 oC) yielding a second generation. This process was repeated three more times to yield a total of five generations. -- chemrxiv.org

Astrochemistry, Astrogeology, Exoplanets, -moons, -comets, Habitable Zones, Water/Hycean Worlds & Oceanography

Planet Formation Throughout The Milky Way: Planet Populations In The Context Of Galactic Chemical Evolution

by Keith CowingSeptember 1, 2023September 1, 2023

Garden cress (Lepidium sativum) grown on a sand substrate with one hundred initial seeds under solar (effective temperature 5800 K), K dwarf (effective temperature 4300 K) and dark conditions. Here the visual results for selected days are shown. Garden cress under K dwarf radiation sprouts sooner relative to solar and dark conditions. -- astro-ph.EP

Analog Studies, Arctic / Antarctic / Alpine, Astrogeology, Away Teams & Field Reports, Venus

Expedition Veritas: Away Team Visits To A Variety Of Terrains

by Keith CowingSeptember 1, 2023September 1, 2023

Exoplanets, -moons, -comets, Habitable Zones

The Stability Of Unevenly Spaced Planetary Systems

by Keith CowingSeptember 1, 2023September 1, 2023