Tag

Macromolecular Carbon

All articles tagged with #macromolecular carbon

science-space4 hours ago•6 min saved

Martian rock at Bright Angel carries surface carbon; origin remains unclear

NASA’s Perseverance rover detected a shallow surface presence of macromolecular carbon on a Martian rock at Bright Angel in Jezero Crater using the SHERLOC UV Raman spectrometer. While the compound resembles terrestrial kerogen, researchers caution it could be biotic or abiotic, and have ruled out instrument artefacts and Earth contamination. The carbon appears associated with carbonate/sulfate minerals at one target and with silicate-rich sediment at another, suggesting multiple emplacement events over geologic time. Definitive biogenic origin remains uncertain until samples are returned to Earth for isotopic and chirality analyses.

via Ars Technica|

#bright-angel #macromolecular-carbon #mars

science7 days ago•48 min saved

Mars rocks reveal complex organics, fueling questions about ancient life

NASA’s Perseverance rover has detected complex organic matter, specifically macromolecular carbon, in rocks within the Bright Angel mudstone sequence in Jezero crater on Mars. The finding strengthens evidence for ancient organics on the planet, but MMC can form through both biological and non-biological processes, so scientists say more analysis is needed to determine if life-related origins are likely. The discovery, part of ongoing work to identify rocks worth returning to Earth for closer study, adds to the broader search for past life on Mars.

via Yahoo|

#bright-angel #complex-organic-matter #macromolecular-carbon

space-science8 days ago•5 min saved

Mars Rock Hints at Ancient Life, But Earth-Based Proof Is Needed

Analysis of Martian rock Cheyava Falls by Perseverance’s SHERLOC and WATSON detected macromolecular carbon, a potential sign of ancient organics and past habitability in Jezero Crater; but MMCs can form abiotically, so a definitive conclusion requires returning samples to Earth—an effort whose future remains uncertain amid stalled Mars Sample Return plans.

via The Register|

#cheyava-falls #jezero-crater #macromolecular-carbon

space9 days ago•112 min saved

Perseverance uncovers Mars' largest cache of complex organic carbon near Bright Angel

NASA’s Perseverance rover found macromolecular carbon in the Bright Angel outcrop at Jezero Crater—the highest concentration of organic molecules detected on Mars to date. SHERLOC mapping and comparisons with Curiosity’s Gale crater data link the carbon to ancient, water-rich conditions and potential habitability, but the finding is not proof of life; a definitive biosignature would require future samples or more data.

via Live Science|

#biosignatures #jezero-crater #macromolecular-carbon

science9 days ago•3 min saved

Mars Rocks Hint at Ancient Life, But Proof Remains Elusive

NASA’s Perseverance rover detected macromolecular carbon on Bright Angel mudstones in Jezero crater, a potential sign of ancient microbial life but non-biological processes could also produce such carbon; the rover’s measurements cannot confirm biogenicity, and Earth-based analyses of returned samples are needed for a definitive answer. This finding, together with Curiosity’s prior organics detections, suggests Mars may have been broadly habitable with widespread organics billions of years ago, though a dedicated sample-return mission is planned for the 2030s.

via The Guardian|

#bright-angel-outcrop #macromolecular-carbon #mars