Alien life may require rare 'just-right' asteroid belts
A large planet does not migrate at all, creating a massive asteroid belt. Material from the hefty asteroid belt would bombard planets, possibly preventing life from evolving, one of three possible scenarios for the evolution of asteroid belts. NASA/ESA/STScI Asteroid belts similar to the one between Mars and Jupiter appear to be rare beyond our solar system, implying that complex alien life may be rare as well, a new study reports. Fewer than 4 percent of known alien solar systems are likely to have an asteroid belt like the one in our own neck of the woods, researchers found. Belts that look like ours may help spur the evolution of life, seeding rocky planets with water and complex chemicals but not pummeling the worlds with a constant barrage of violent impacts.
Keywords:
asteroid belt solar system snow line giant planet planet space rocks Jupiter rocky planet our planet warm dust Space Telescope Space Telescope Science Institute the right place belts Spitzer Space Telescope alien life complex Mario Livio Royal Astronomical Society punctuated equilibrium biological evolution Rebecca Martin the snow 10 kilometers observations organic compounds the solar system early earth planetary systems water ice a little bit computer models large scenario the status quo worlds stars hefty lifeforms wiped migrates SPACE.com evolving spur pummeling comets gravitational dinosaurs scattering occasionalPeople:
Mario Livio
Overall Sentiment: 0.0504648
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| -0.0282851 | "If a large planet like Jupiter migrates through the belt, it would scatter the material," Livio added. ... |
| -0.101452 | "If a large planet like Jupiter migrates through the belt, it would scatter the material," Livio added. "If, on the other hand, a large planet did not migrate at all, that, too, is not good because the asteroid belt would be too massive. There would be so much bombardment from asteroids that life may never evolve." |
| 0.0264869 | "Based on our scenario, we should concentrate our efforts to look for complex life in systems that have a giant planet outside of the snow line," Livio said. ... |
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Rebecca Martin
Overall Sentiment: 0.22869
Relevance: 0.564875
| Sentiment | Quote |
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| 0.122425 | "The warm dust falls right onto our calculated snow lines, so the observations are consistent with our predictions," Martin said. ... |
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FieldTerminology: solar systems
Overall Sentiment: 0
Relevance: 0.465164
Technology: Spitzer Space Telescope
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Organization: Royal Astronomical Society
Overall Sentiment: 0
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Organization: Space Telescope Science Institute
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Organization: University of Colorado
Overall Sentiment: 0.0673639
Relevance: 0.33336
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Organization: NASA
Overall Sentiment: 0.0844041
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Alien life may require rare 'just-right' asteroid belts
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Asteroid belts similar to the one between Mars and Jupiter appear to be rare beyond our solar system, implying that complex alien life may be rare as well, a new study reports.
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