Two dozen exoplanets superior to Earth for life?
The uncertainty of science: A team of scientists have now identified 24 exoplanets from the Kepler telescope archive that they propse might actually be better for life than Earth itself.
All the exoplanets are rocky and terrestrial, like the Earth. All are in the habitable zone, meaning that they orbit their star at a distance that makes their general temperature comparable to Earth.
What makes them superior, according to these scientists, are three factors. First, their stars are not G-type stars, like the Sun, but K-types. K-types have much longer lifespans, 70 billion years compared to the Sun’s 8 to 10 billion, allowing more time for life to develop.
Second, the planets have a slightly greater mass than Earth.
Part of the reason the Earth is habitable is because it’s large enough to be geologically active, giving it a protective magnetic field, and has enough gravity to retain an atmosphere. According to the team, if a planet was 10 percent larger, it would have more surface area to live on. If it was 1.5 times as massive as the Earth, its interior would retain more heat from radioactive decay, would remain active longer, and hold onto its atmosphere for a longer time.
Finally, the orbits of these two dozen exoplanets makes them just slighter warmer than Earth, which is thought to be beneficial to life.
This is interesting, but it is pure guesswork. These factors might make our Earth life happier, but these scientists have no idea if such conditions are beneficial or harmful to the creation of life. At present we have zero data on what the ideal conditions would be.
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The uncertainty of science: A team of scientists have now identified 24 exoplanets from the Kepler telescope archive that they propse might actually be better for life than Earth itself.
All the exoplanets are rocky and terrestrial, like the Earth. All are in the habitable zone, meaning that they orbit their star at a distance that makes their general temperature comparable to Earth.
What makes them superior, according to these scientists, are three factors. First, their stars are not G-type stars, like the Sun, but K-types. K-types have much longer lifespans, 70 billion years compared to the Sun’s 8 to 10 billion, allowing more time for life to develop.
Second, the planets have a slightly greater mass than Earth.
Part of the reason the Earth is habitable is because it’s large enough to be geologically active, giving it a protective magnetic field, and has enough gravity to retain an atmosphere. According to the team, if a planet was 10 percent larger, it would have more surface area to live on. If it was 1.5 times as massive as the Earth, its interior would retain more heat from radioactive decay, would remain active longer, and hold onto its atmosphere for a longer time.
Finally, the orbits of these two dozen exoplanets makes them just slighter warmer than Earth, which is thought to be beneficial to life.
This is interesting, but it is pure guesswork. These factors might make our Earth life happier, but these scientists have no idea if such conditions are beneficial or harmful to the creation of life. At present we have zero data on what the ideal conditions would be.
Readers!
Please consider supporting my work here at Behind the Black. Your support allows me the freedom and ability to analyze objectively the ongoing renaissance in space, as well as the cultural changes -- for good or ill -- that are happening across America. Fourteen years ago I wrote that SLS and Orion were a bad ideas, a waste of money, would be years behind schedule, and better replaced by commercial private enterprise. Only now does it appear that Washington might finally recognize this reality.
In 2020 when the world panicked over COVID I wrote that the panic was unnecessary, that the virus was apparently simply a variation of the flu, that masks were not simply pointless but if worn incorrectly were a health threat, that the lockdowns were a disaster and did nothing to stop the spread of COVID. Only in the past year have some of our so-called experts in the health field have begun to recognize these facts.
Your help allows me to do this kind of intelligent analysis. I take no advertising or sponsors, so my reporting isn't influenced by donations by established space or drug companies. Instead, I rely entirely on donations and subscriptions from my readers, which gives me the freedom to write what I think, unencumbered by outside influences.
You can support me either by giving a one-time contribution or a regular subscription. There are four ways of doing so:
1. Zelle: This is the only internet method that charges no fees. All you have to do is use the Zelle link at your internet bank and give my name and email address (zimmerman at nasw dot org). What you donate is what I get.
2. Patreon: Go to my website there and pick one of five monthly subscription amounts, or by making a one-time donation.
3. A Paypal Donation or subscription:
4. Donate by check, payable to Robert Zimmerman and mailed to
Behind The Black
c/o Robert Zimmerman
P.O.Box 1262
Cortaro, AZ 85652
You can also support me by buying one of my books, as noted in the boxes interspersed throughout the webpage or shown in the menu above.
I like how they said that since the star type was longer lived there would be more time for life to develop.
Like billions of years more than on Earth.
They act like they will either quarantine that planet just because in a billion years life might eventually development. Or someone will be around who actually cares.
And if life would be happier on a warmer planet why are we so afraid of global warming?
If these are “Better” places than planet earth maybe we can get all of the Liberals, Leftists, ANTIFA, BLM and TDS laden and unhappy Democrat party members together and send them to one of them so they can build the “utopia” that they are determined to build here on top of our beautiful country.
I think its time that these kinds of people are encouraged to move, all expenses paid, to another planet and demonstrate just how unlucky and ignorant we all are here in America that resist their efforts. Lets get Musk on this, he could make it happen.
Life appeared on Earth as soon as its molten surface cooled down. So time is not an issue from the one sample that we know of and ourselves are. Do they mean that those planets have been around for 5 times the age of the universe?
Venus is practically as large as the Earth is, but has no magnetic field. And holds on to a 90 times denser atmosphere. It is in the habitable zone, but has 900 Fahrenheit surface temperature.
These guys certainly don’t know nothing about what they are talking about!
Local asked:
“Do they mean that those planets have been around for 5 times the age of the universe?”
No, but they have the potential to last far longer than our Sun does, if the current solar models are correct. So, they might yet evolve life, even if they have not, by chance, just yet. Since they are just a bit heavier than Earth their mantle circulation *may* be moving fast enough that their CO2 variations are not as extreme as Earth’s, giving a more stable temperature.
“It (Venus) is in the habitable zone, but has 900 Fahrenheit surface temperature.”
That is because it has a 90 bar CO2 atmosphere. Basically, all its carbonate rocks were calcined into Oxides and CO2 several hundred million years ago, by a vast turnover of its crust, instead of the steady and slow turnover we have on Earth. This is because Venus is just a bit too small to have the currents of molten rock in its mantle pushing at the crust hard enough for continual turnover, but just big enough for stresses from the currents in the mantle to build up, and then turn over the entire crust in a single burst of activity releasing the heat of mantle material onto the surface.
If the Earth lost all its carbonate rocks to calcination, we’d likely have around 90 Bars of CO2 in the atmosphere as well, and similar surface conditions to Venus, though maybe slightly cooler because of greater distance from the Sun.
I don’t think Venus is too small for plate tectonics- It’s practically the same size as earth. Quick web search: 0.9499 the size of Earth and 0.815 as massive. Pure speculation but I think whatever went wrong on Venus might be related to the event that caused its rotation be so off compared to the other terrestrial planets and the supposed global resurfacing event. I think Venus got whacked and didn’t get a large moon out of it.
Yeah, there’s a lot of assumptions and guesswork in that article. But…the old world left for the new world for freedom and opportunity. I wonder if the first people to leave Earth will just be fed up with oppression and authoritarianism. When there’s no where else to go, maybe I can deal with a deeper gravity well and a nice balmy climate, and G type stars are over rated. Forget Mars, no air, no magnetosphere, no rivers, no tree analogs, no nothing. How far away are these planets again, maybe we can hot rod starship?!
Ahhhh, Exo-Biology, a field of “study” with no examples, just theories
If I recall correctly, the latest broadly accepted theories on why Venus has such a slow rotation has to do with its very thick atmosphere in combination with tidal interactions from the Sun slowed the planet’s rotation down due to friction over 100’s of millions of years. Also, because it likely lacked the whack the Earth got that created the moon which ejected a lot of crustal mass into space, Venus has a thicker crust which accounts for the difference in crustal dynamics between the two planets.
Unfortunately, we don’t know if it is Earth or Venus which is the atypical oddball with regards to rocky terrestrial planets. My bet is it would be the Earth.
One thing that is nice about the Earth’s relatively low mass with regards to the rocky terrestrial planets we are finding is that is still possible to use chemical energy to get to orbit. If the Earth were much more massive launching even the smallest artificial satellite would be orders of magnitude more difficult using current day rocket technologies. Whether over the long term this would be a hinderance to civilizations becoming space faring is unknown, but it would certainly have a profound effect on recent human history as it transitions from the industrial age to the information age.
This is not favored (but also not completely excluded) among astronomers, but it could be that Venus is different because of a collision. Either by a huge comet that hit it, bringing all the CO2 and stopping its rotation. But that’s unlikely for ballistic reasons. Or perhaps a bit more likely that Venus was formed with a large moon that spiraled into it, like Phobos will crash into Mars within a few 10 millions of years (only 1% of Mars’ age from now). On Venus all the carbon remained an atmospheric gas, while on Earth that somehow so to speak “crystalized” into biology and minerals.
@mpthompson
But WHY does Venus have a thick crust and a thick atmosphere and no magnetic dynamo, when we do?