Earth-sized exoplanet ‘habitable zone’
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Earth-sized exoplanet ‘habitable zone’
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Re: Earth-sized exoplanet ‘habitable zone’
#2According to this [1] it's probably tidally locked, which means that despite being in the goldilocks zone, the environment is likely problematic for life.
[1] https://www.sciencealert.com/nasa-found-a-tatooine-like-plan...
Re: Earth-sized exoplanet ‘habitable zone’
#3According to this [1] it's probably tidally locked, which means that despite being in the goldilocks zone, the environment is likely problematic for life. [1] https://www.sciencealert.com/nasa-found-a-tatooine-like-plan...
I imagine that there is a small area where life would be possible?
Re: Earth-sized exoplanet ‘habitable zone’
#4>Astronomers have discovered a world only a little bit bigger than Earth, whirling around a bright star about 31 parsecs from our planet.
Parsec is one of those units that is difficult to remember if you just look at the conversion (1 parsec = 3.26 light years). If you remember how it's defined, however, it somehow becomes easier (for me anyway). One parsec is the distance at which one astronomical unit (AU, mean distance between earth and sun) spans one arcsecond in the sky. One arcsecond, in turn, is 1/3600th of a degree, and is approximately the width of a human hair from 20 meters away.
On a side note, if you think that's small, many stars in the night sky have apparent diameters measured in thousandths of an arcsecond.
Re: Earth-sized exoplanet ‘habitable zone’
#5According to this [1] it's probably tidally locked, which means that despite being in the goldilocks zone, the environment is likely problematic for life. [1] https://www.sciencealert.com/nasa-found-a-tatooine-like-plan...
I imagine that there is a small area where life would be possible?
These types of planets are known as 'Eyeball planets'. [1] They are hypothesized to have a hot side and a cold side, and potentially a ring around the periphery that is 'just right' where liquid water could form and sustain life.
Not sure if this particular planet would meet those criteria.
Re: Earth-sized exoplanet ‘habitable zone’
#6According to this [1] it's probably tidally locked, which means that despite being in the goldilocks zone, the environment is likely problematic for life. [1] https://www.sciencealert.com/nasa-found-a-tatooine-like-plan...
People keep saying that for extreme climates on Earth and are then constantly surprised by the variety and abundance of life - admittedly sometimes just microbiology - found in those locations. So I wouldn’t write off a planet just for tidal lock.
Re: Earth-sized exoplanet ‘habitable zone’
#7> Astronomers have discovered a world only a little bit bigger than Earth, whirling around a bright star about 31 parsecs from our planet. Parsec is one of those units that is difficult to remember if you just look at the conversion (1 parsec = 3.26 light years). If you remember how it's defined, however, it somehow becomes easier (for me anyway). One parsec is the distance at which one astronomical unit (AU, mean di…
I’m not sure if the definition helped.
Re: Earth-sized exoplanet ‘habitable zone’
#8> Astronomers have discovered a world only a little bit bigger than Earth, whirling around a bright star about 31 parsecs from our planet. Parsec is one of those units that is difficult to remember if you just look at the conversion (1 parsec = 3.26 light years). If you remember how it's defined, however, it somehow becomes easier (for me anyway). One parsec is the distance at which one astronomical unit (AU, mean di…
That was a lot of fascinating information in one comment.
Also fun to note that you mentioned "mean distance" and not just "distance" from the Sun because the Earth's orbit isn't perfectly circular.
Thanks for the explanation.
Re: Earth-sized exoplanet ‘habitable zone’
#9> Astronomers have discovered a world only a little bit bigger than Earth, whirling around a bright star about 31 parsecs from our planet. Parsec is one of those units that is difficult to remember if you just look at the conversion (1 parsec = 3.26 light years). If you remember how it's defined, however, it somehow becomes easier (for me anyway). One parsec is the distance at which one astronomical unit (AU, mean di…
I’m not sure if the definition helped.
Haha fair point. I don't know why it helped me, but it seemed to.
Re: Earth-sized exoplanet ‘habitable zone’
#10Earlier quoted context omitted.
I imagine that there is a small area where life would be possible?
These types of planets are known as 'Eyeball planets'. [1] They are hypothesized to have a hot side and a cold side, and potentially a ring around the periphery that is 'just right' where liquid water could form and sustain life. Not sure if this particular planet would meet those criteria. [1] https://en.wikipedia.org/wiki/Eyeball_planet
Even if the planet had a strong magnetosphere, wouldn't atmosphere on the hot side be blown away by heat or solar wind? Thus atmosphere from the whole planet would be depleted.