May 2024 – Page 2 – My WordPress Site

Vesicles within the protocell-like structure. CREDIT Scripps Research

Astronomy & Telescopes, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy

Paths To Robust Exoplanet Science Yield Margin For The Habitable Worlds Observatory

by Keith CowingMay 31, 2024May 31, 2024

Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Habitable Zones, Proxima Centauri, Space Weather & Heliophysics, TRAPPIST-1

Lethal Surface Ozone Concentrations Are Possible On Habitable Zone Exoplanets

by Keith CowingMay 31, 2024

Journey of a noncanonical amino acid into a polypeptide. The cell takes up the ncAA from its environment or biosynthesizes it. The ncAA should not interfere with the host metabolism nor act as a toxin. To accumulate, it must not be degraded nor excreted by the cell. If its intracellular concentration reaches an adequate level, an aminoacyl-tRNA synthetase (AARS) activates it and charges it onto a tRNA. Discrimination against the ncAA by the editing function of some AARS prevents the downstream steps and should be avoided. An elongation factor delivers the ncAA-charged tRNA to the ribosome, where it participates in ribosomal translation. Peptide bonding stably incorporates the ncAA into the nascent polypeptide. The resulting alloprotein must be able to fold correctly and should not be degraded, e.g., by proteolytic enzymes. Chemical Reviews via PubMed

Astrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Stellar Cartography

Webb Telescope Observes Organic Astrochemistry In Dwarf Galaxy NGC 4449

by Keith CowingMay 30, 2024May 30, 2024

Visual Abstract -- JACS Au via PubMed

AI - Data - Apps - Cybernetics, Analog Studies, Arctic / Antarctic / Alpine, Away Teams & Field Reports, Biosignatures & Paleobiology, Exploration Gear & Tech, Genomics, Proteomics, Bioinformatics, Habitable Zones, Mars, Microbiology & Virology, Missions & Hardware, Planetary Protection & Biosafety, Robotics/Rovers/UAVs, Sample Return, Space Life Science, Tricorders & Sensors

Tricorder Tech: The Limits, Capabilities, and Potential for Life Detection with MinION Sequencing in a Paleochannel Mars Analog

by Keith CowingMay 30, 2024May 30, 2024

Astrochemistry, Astrogeology, Comets and Asteroids, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Mars, Missions & Hardware, Sample Return

Phobos Photometric Properties From Mars Express HRSC Observations (Comet Capture?)

by Keith CowingMay 30, 2024May 31, 2024

A researcher holds a vibrant green sample of thermophilic cyanobacteria collected from a hot spring in Yellowstone’s Lower Geyser Basin. National Park Service photo by Samantha Hilburn, August 2025. Research conducted under Yellowstone National Park research permit YELL-2025-SCL-8336

Astrochemistry, Astrogeology, Astronomy & Telescopes, Beta Pictoris, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy

JWST-TST High Contrast: JWST/NIRCam Observations Of The Young Giant Planet β Pic b

by Keith CowingMay 30, 2024May 30, 2024

Panel (a): H–R diagram of the open cluster members stars with GALEX observations. The blue solid line is the fitting results of main sequences. green dashed lines represent the upper and lower bounds of the main sequence fitted with a ±0.5 offset, and the red dashed lines is the same sequence shifted upwards by 2. Panel (b): H–R diagram of the field stars with GALEX observations. Panel (c): The galactic distribution of the selected sources from open clusters. The color bar represent the age of the stars. Panel (d): The galactic distribution of the selected sources from field stars. -- astro-ph.SR

Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Nanotechnology & SynBio, Origin & Evolution of Life

Competitive Exclusion Among Self-Replicating Molecules Curtails The Tendency Of Chemistry To Diversify

by Keith CowingMay 30, 2024May 30, 2024

The result of applying the trained Planet-FP SOMs on their respective training data. The plots showcase the position of each training event on the SOM pixel map with some added random scatter up to 0.5 from the position to enhance clarity. The synthetic planet events are plotted in green and each respectiveFPeventinorange.The plots highlight the clustering of the similarly shaped events and thus the effectiveness of each SOMind istinguishing between the Planetand FP candidates. As expected, the SOM is highly effective for EB based FP scenarios and increasingly less effective for diluted planet scenarios. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Stellar Cartography

Stellar Cartography: New Ultralow-noise Superconducting Camera for Exoplanet Searches

by Keith CowingMay 30, 2024May 30, 2024

Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Life Support Systems, Microbiology & Virology, Plant Biology, Space Agriculture, Space Weather & Heliophysics, Terraforming & Geoengineering, Water/Hycean Worlds & Oceanography

Observation of Significant Photosynthesis in Garden Cress and Cyanobacteria under Simulated Illumination from a K Dwarf Star

by Keith CowingMay 30, 2024

Formic acid, HCOOH -- Wikipedia

Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biophysics, Exoplanets, -moons, -comets, Habitable Zones, Magnetic Fields, Electromagnetism, bioelectricity,, Proxima Centauri, Radiation, Space Weather & Heliophysics

MHD Simulations of the Space Weather in Proxima b: Habitability Conditions and Radio Emission

by Keith CowingMay 30, 2024May 30, 2024