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First Earth-Size World in the 'Habitable Zone' Found
- stevenwliao 7y agoAre planets that are earth-sized more likely to contain life than ones without?
- nwallin 7y agoYes. Planets that are smaller than Earth are much more likely to have their hydrogen stripped away by their host star, leaving them without water. Planets that are larger than Earth are likely to have their growth accelerate into gas giants. Mass distribution of planets shows a gap in sizes between about 1.5 and 2 times the size of the Earth. Life requires complex chemistry. Complex chemistry can't happen in the dense, hot cores of gas giants, because the heat will destroy any interesting chemicals. Complex chemistry can't happen in the solid phase, because nothing moves around very much. Even though complex chemistry can happen in the gaseous phase, life can't start, because the simple life precursors can't bind themselves. So it requires a liquid. Liquid either means water, so not small planets, or temperatures found only outside the habitable zone, which means solvents other than water, which are unlikely to host life for a variety of reasons.
- perl4ever 7y agoWater doesn't have to be on the surface.
- pg_is_a_butt 7y agoPretty sure there already was an Earth sized world found... it's called Earth.
- monkeycantype 7y ago'completes one orbit every 10 Earth days' Excellent news for fans of the French Revolutionary Calendar. 'The French Revolutionary Calendar, created at the same time as the metric system, was an attempt to create a metric calendar and time system.' https://www.cooksinfo.com/french-revolutionary-calendar https://www.cooksinfo.com/french-revolutionary-calendar https://en.wikipedia.org/wiki/French_Republican_calendar https://en.wikipedia.org/wiki/French_Republican_calendar https://twitter.com/sansculotides https://twitter.com/sansculotides
- stuaxo 7y agoI wasn't wearing my glasses and read it as "Flat earth size world found in habitable zone found" which would be a very different story.