When searching for signs of ancient life on Mars, NASA scientists increasingly focus on organic material -- the carbon-based compounds that are the building blocks of life. Organics were found by the Curiosity rover in Gale Crater, and now new papers report they have also been identified by the instruments of the Perseverance rover in …
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The James Webb Space Telescope was developed to allow us to see the cosmos in a new way -- with much greater precision, using infrared wavelengths to piece through dust around galaxies, stars and planets, and to look further back into time and space. In the less than four months since the first Webb images …
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What set the stage for the emergence of life on early Earth? There will never be a single answer to that question, but there are many partial answers related to the global forces at play during that period. Two of those globe-shaping dynamics are the rise of the magnetic fields that protected Earth from hazardous …
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The presence of life brings many unexpected consequences. On Earth, for instance, when cyanobacteria spread widely in ancient oceans more than two billion years ago, their production of increasingly large amounts of oxygen killed off much of the other anaerobic life present at the day because oxygen is a toxin, unless an organism finds ways …
It's been some years since Europa scientists agreed that the Jovian moon has a large global ocean beneath miles of ice. More recently, scientists have identified what they view as pockets of water surrounded by ice but much nearer the surface than the ocean below. And there has been research as well into what may …
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For NASA to extend its space science missions well past their original lifetime in space has become such a commonplace that it is barely noticed. The Curiosity rover was scheduled to last on Mars for two years but now it has been going for a decade -- following the pace set by earlier, smaller Mars …
Continue reading "The Juno Spacecraft Images Jupiter’s Moon Europa as it Speeds Past"
As scientists work to understand what might make a distant planet habitable, one factor that is getting attention is the shape of the planet's orbit, how "eccentric" it might be. It might seem that a perfect circular orbit would be ideal for habitability because it would provide stability, but a new model suggests that it …
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For more than two decades now, the Virtual Planetary Laboratory (VPL) at the University of Washington in Seattle has been at the forefront of the crucial and ever-challenging effort to model how scientists can determine whether a particular exoplanet is capable of supporting life or perhaps even had life on it already. To do this, …
NASA's long-time motto for exploring Mars has been "Follow the water." That has changed some in recent years, as the presence of long-ago H2O has been confirmed in many locales around the planet. Moving on, the motto today is more "Follow the organics" -- the carbon-based building blocks of life -- in the search for …
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The James Webb Space Telescope has begun the part of its mission to study the atmospheres of 70 exoplanets in ways, and at a depth, well beyond anything done so far. The telescope is not likely to answer questions like whether there is life on distant planet -- its infrared wavelengths will tell us …
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Many Worlds 