Hi everyone,
just a "simple" question.
What are the most likely stars to have terranstyle planets orbiting around them?
As our sun is a G2V, the G-type seems to ge good, at least in the main sequence.
What others are most likely?
F- and K-type stars of the main sequence?
Answers are very welcome.
Regards,
Guckytos
Most likely stars for terranstyle planets?
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eburacum45
- Posts: 691
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You have it pretty well covered, there ; perhaps a few of the larger and more stable (i.e flare free) red dwarfs of class M would also be suitable candidates. There are some red dwarfs in the Tarter and Turnbull HabCat, for example.
What do you mean by an Earth-type planet? The Earth itself has only had an oxygen rich atmosphere for about half a billion years or so; for most of its existence, it has had life, but that life had not yet produced enough oxygen to make an atmosphere breathable by humans.
Would a lifebearing Precambrian world with no Oxygen be Earth-like?
Some Earth-like worlds orbiting F dwarfs might be heated prematurely so that they develop moist greenhouse conditions almost as soon as they develop life; perhaps life might adapt somehow. Even our own world will become too hot for our kind of biosphere in a billion years or so. The variations on the Earthlike theme are probably many in number; I recommend looking at John Dollan's speculative -Planetary Classification List for an idea of how variable such worlds might be.
What do you mean by an Earth-type planet? The Earth itself has only had an oxygen rich atmosphere for about half a billion years or so; for most of its existence, it has had life, but that life had not yet produced enough oxygen to make an atmosphere breathable by humans.
Would a lifebearing Precambrian world with no Oxygen be Earth-like?
Some Earth-like worlds orbiting F dwarfs might be heated prematurely so that they develop moist greenhouse conditions almost as soon as they develop life; perhaps life might adapt somehow. Even our own world will become too hot for our kind of biosphere in a billion years or so. The variations on the Earthlike theme are probably many in number; I recommend looking at John Dollan's speculative -Planetary Classification List for an idea of how variable such worlds might be.
Man I really need to get that Classification List finished....
At any rate, another place to look for some good, potentially Earth-style habitable stars is the list at Solstation.com, where the appropriate stars have an asterisk (*) next to them. But this only addresses the prospective late F through early K stars, although various parameters such as age or the presence of exoplanets are taken into account.
...John...
At any rate, another place to look for some good, potentially Earth-style habitable stars is the list at Solstation.com, where the appropriate stars have an asterisk (*) next to them. But this only addresses the prospective late F through early K stars, although various parameters such as age or the presence of exoplanets are taken into account.
...John...
"To make an apple pie from scratch, you must first create the universe..."
--Carl Sagan
--Carl Sagan
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PlutonianEmpire
- Posts: 1374
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Heh, I just got a new hard drive myself. But I keep my important files on a pin drive (which, I know, only increases the risk of me losing that somewhere between home and work).
At any rate, I've been fddling with the PCL tonight, refining a couple of entries, although I haven't been able to upload it to the web page yet. One major thing that I will need to do, I think, is go through the worlds of our own Solar System and classify THEM... that should serve as the basis for a fairly detailed classification scheme. And then I can continue to add to it as new ideas are put forth.
Then I can make default textures and models for all of the different types!
...John...
At any rate, I've been fddling with the PCL tonight, refining a couple of entries, although I haven't been able to upload it to the web page yet. One major thing that I will need to do, I think, is go through the worlds of our own Solar System and classify THEM... that should serve as the basis for a fairly detailed classification scheme. And then I can continue to add to it as new ideas are put forth.
Then I can make default textures and models for all of the different types!
...John...
"To make an apple pie from scratch, you must first create the universe..."
--Carl Sagan
--Carl Sagan
-
PlutonianEmpire
- Posts: 1374
- Joined: 09.09.2004
- Age: 40
- With us: 20 years 2 months
- Location: MinneSNOWta
- Contact: