May 2023 – Page 4 – My WordPress Site

Astrochemistry, Astrogeology, Meteorites & Asteroids, Origin & Evolution of Life

A Role For Meteoritic Iron In The Emergence Of Life On Earth

by Keith CowingMay 25, 2023May 25, 2023

Top, Upper Panels: Individual visit transmission spectra for ExoTiC-JEDI (left, purples) and Eureka! (right, greens). Lower Panel: Difference between individual visit transmission spectra for ExoTiC-JEDI (left) and Eureka! (right). On average, the ExoTiC-JEDI reductions for visit 1 and visit 2 are consistent to within 39 ppm, while the Eureka! reductions agree to within 48 ppm. The ExoTiC-JEDI and Eureka! reductions are consistent with each other to within the median transit depth uncertainty for both visit 1 and visit 2. Bottom, Upper Panel: Weighted average transmission spectrum from the two visits from the ExoTiC-JEDI (purple) and Eureka! (light green) reductions and joint fit transmission spectrum from the Eureka! reduction (dark green). Lower Panel: Difference between each of the combined ExoTiC-JEDI and Eureka! transmission spectra in ppm. As the difference between the two Eureka! methods is less the 5 ppm (black line), the two ExoTiC-JEDI– Eureka! lines are difficult to distinguish (coloured lines). On average, the combined visit Eureka! and ExoTiC-JEDI spectra are consistent to within 10 ppm. -- astro-ph.EP

Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments

How Geobiological Feedback Makes Some Yellowstone Hydrothermal Pools Acidic

by Keith CowingMay 24, 2023May 25, 2023

The Desert Research Institute team extracting samples from the bore hole at Death Valley. CREDIT Duane Moser, Desert Research Institute

Astrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Habitable Zones, Origin & Evolution of Life

Isotopic Constraints On Lightning As A Source Of Fixed Nitrogen In Earth’s Early Biosphere

by Keith CowingMay 24, 2023May 24, 2023

We show the transmission spectrum for each reduction in the top panel and the differences between the reductions (in units of sigma) in the bottom panel. All three of our reductions agree per-point, at the ∼2σ level or better, with a median difference of 6ppm. -- astro-ph.EP

AI - Data - Apps - Cybernetics, Astronomy & Telescopes, Exoplanets, -moons, -comets

Discovery of 69 New Exoplanets Using Machine Learning

by Keith CowingMay 23, 2023May 23, 2023

OSIRIS-Rex Sample Return

Away Teams & Field Reports, Biogeochemical Cycles & Geobiology, Exploration Gear & Tech, Tricorders & Sensors, Water/Hycean Worlds & Oceanography

Elation Through Filtration: An Oceanographer’s Sensations at Sea Aboard R/V Sally Ride

by Keith CowingMay 22, 2023May 22, 2023

Using a nanomanipulator and an ultra-fine ion beam, a tiny lamella, about five by ten micrometres in size and only one hundred nanometres thin, is cut out of the meteorite and attached to a sample bar. The scientists can then analyze the organic particles in this lamella under an electron microscope (right). CREDIT SuperSTEM Laboratory, Daresbury, UK

Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Titan

Spitzer IRS Observations of Titan as a Precursor to JWST MIRI Observations

by Keith CowingMay 22, 2023May 22, 2023

Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Origin & Evolution of Life

New Research Sheds Light on the Possible Origins of Life

by Keith CowingMay 22, 2023May 22, 2023

Education and Outreach, Intelligence & Language, SETI & Technosignatures, Societal Issues

First Contact: Global Team Simulates Message From Extraterrestrial Intelligence To Earth

by Keith CowingMay 22, 2023

Astrochemistry, Biochemistry & Organic Chemistry, Interstellar

Catalytic Role Of HI In The Interstellar Synthesis Of Complex Organic Molecules

by Keith CowingMay 21, 2023May 21, 2023

Offworld Biology Laboratory Sample Processing --- NASA

Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones

Assessing Exoplanet Habitability through Data-driven Approaches: A Comprehensive Literature Review

by Keith CowingMay 21, 2023May 21, 2023