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    Saturn’s icy moon may host a stable ocean fit for life

    November 11, 2025, Categories  Astronomy/Space

    Enceladus heat transfer infographic
    A new study has constrained the Enceladus’ global conductive heat flow by studying its seasonal temperature variations at its north pole (yellow). These results, when combined with existing ones of its highly active south polar region (red) provide the first observational constraint of Enceladus’ energy loss budget (<54 GW) – which is consistent with the predicted energy input (50 to 55 GW) from tidal heating. This implies Enceladus’ current activity is sustainable in the long term – an important prerequisite for the evolution of life, which is thought possible to exist in its global sub-surface ocean. Image credit: University of Oxford/NASA/JPL-CalTech/Space Science Institute (PIA19656 and PIA11141)

    A new study led by researchers from Oxford University, Southwest Research I...

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    Cosmic Dust may be Key Source of Phosphorus for Life on Earth

    November 19, 2021, Categories  Astronomy/Space

    Sunlight reflects off tiny, interplanetary dust particles, creating the faint column of glowing light seen against the stars in this image. New research suggests that cosmic dust might be an important source of phosphorus for life on Earth. Credit: Malcol, CC BY 3.0
    Source: Journal of Geophysical Research: Space Physics

    When Earth formed 4.5 billion years ago, any phosphorus that was present likely sank into the molten core because of the element’s distinct chemical properties. However, phosphorus is essential for life; it is found in DNA, RNA, and other important biological molecules. So it is probable that the phosphorus that made life possible was delivered to Earth’s surface from extraterrestrial origins, and previous studies have suggested meteorites as potential sources.

    Now, P...

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    Rosetta’s Comet contains Ingredients for Life

    May 28, 2016, Categories  Astronomy/Space

    Rosetta's comet in August 2015, when it was closest to the sun and when most of the glycine was detected. Credit: ESA

    Rosetta’s comet in August 2015, when it was closest to the sun and when most of the glycine was detected. Credit: ESA

    Ingredients crucial for the origin of life on Earth, including the simple amino acid glycine and phosphorus, key components of DNA and cell membranes, have been discovered at Comet 67P/Churyumov-Gerasimenko. The possibility that water and organic molecules were brought to the early Earth through impacts of objects like asteroids and comets have long been the subject of important debate...

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