Planet Hunters Report Record-Breaking Discovery, Search for other habitable planets

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Profile Julie
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Message 1434785 - Posted: 28 Oct 2013, 16:10:39 UTC

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Message 1435776 - Posted: 30 Oct 2013, 21:53:02 UTC - in response to Message 1434785.  

I'm not moving there.

http://www.foxnews.com/science/2013/10/30/earth-2-rocky-earth-sized-planet-discovered-700-light-years-away/

Earth 2? Scientists study rocky, Earth-sized planet 700 light years away
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Message 1436043 - Posted: 31 Oct 2013, 15:59:34 UTC

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Message 1436052 - Posted: 31 Oct 2013, 16:17:17 UTC - in response to Message 1436043.  

Ouch!
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Message 1436260 - Posted: 31 Oct 2013, 22:07:12 UTC - in response to Message 1436052.  

Ouch!


+1

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Message 1439562 - Posted: 7 Nov 2013, 6:53:40 UTC

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Message 1439970 - Posted: 7 Nov 2013, 20:52:54 UTC

This report highlights how much they really don't know about these exo-planets.
Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events.
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Message 1453138 - Posted: 12 Dec 2013, 7:27:51 UTC - in response to Message 1439970.  

judge for yourself..

An alien planet climate analysis cuts nearly in half the estimated number of habitable planets in our galaxy, scientists reported on Wednesday.


Many Earth-Like Planets Have Climates Too Hot for Life


http://news.nationalgeographic.com/news/2013/12/131211-fewer-habitable-planets-hot-climate-greenhouse-science/
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Message 1453234 - Posted: 12 Dec 2013, 16:14:24 UTC - in response to Message 1453138.  
Last modified: 12 Dec 2013, 16:17:28 UTC

Many Earth-Like Planets Have Climates Too Hot for Life


Then these are not "Earth-like" and wouldn't be unless they had many more characteristics that would make intelligent life possible.

Write down these requirements and you will have a dozen or more items that must be in a narrow parametric range.

When we start verifying that we have found planets that meet all or most of these essentials then we would have an idea of how many or how few of them there really are. All the current hype about "Earth-like" planets is pure fakery and does a disservice to the idea of SETI ; reducing it to Al Gore style pseudo-science.
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Message 1453553 - Posted: 13 Dec 2013, 15:10:48 UTC

What a Habitable Planet Twice the Size of Earth Would Be Like:

http://io9.com/what-a-habitable-planet-twice-the-size-of-earth-would-b-1476308959
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Message 1453554 - Posted: 13 Dec 2013, 15:30:08 UTC - in response to Message 1453553.  

At the same density as the Earth; a planet with twice the radius of the Earth would have 8 times the gravity
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Message 1453792 - Posted: 14 Dec 2013, 7:40:58 UTC

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Message 1455426 - Posted: 19 Dec 2013, 12:40:23 UTC

If confirmed, the alien world would be one of the closest to our sun ever found.

Alien Planet May Lurk Around Nearby Failed Stars
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Message 1455451 - Posted: 19 Dec 2013, 14:17:59 UTC - in response to Message 1393800.  

What do you all think is an essential parameter and it's range for intelligent life to form.

I don't know the parameter range, but you will probably need a carbon fossil-fuel phase to allow intelligence to develop. At least cooking meat over an open fire was apparently essential to allowing humans to get off of a fruit and vegetable diet, which allowed for a smaller gut so that they could walk upright (freeing their hands to use tools) and also allow for larger brain development due to more proteins in the diet. You also need enough fossil fuels for the industrial age, without which you would never get the scientific instruments necessary to explore the universe, or even your own planet. Therefore, the planet must be old enough to allow such fossil fuels to develop, and would have to have gone through various tropical/non-tropical phases to allow for both the growth of plants and their preservation for a later time.

However, you may not make it past the carbon age due to Global Warming if there are no ready substitutes, and you don't learn how to use them soon enough. So you may possibly need uranium (or thorium) to allow for a nuclear age. But the uranium must have enough U235 to allow for enrichment to useable levels. However, if there is too much U235, then it is too easy to make nuclear weapons, and the civilization probably won't make it past that phase either.

You can speculate that slugs, etc. have intelligence, but that won't get you very far. They did not develop it on our planet, due to lack of mobility, etc., and they probably won't on any other. The most likely life forms that we can know of at the moment would probably go through a phase more or less like our own, though how they develop a million years after that is another question.
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Message 1460239 - Posted: 3 Jan 2014, 7:21:50 UTC

Researchers Use Hubble Telescope to Reveal Cloudy Weather On Alien World


The scrutinized planet, which is known as GJ1214b, is classified as a super-Earth type planet because its mass is intermediate between those of Earth and Neptune. Recent searches for planets around other stars ("exoplanets") have shown that super-Earths like GJ 1214b are among the most common type of planets in the Milky Way galaxy. Because no such planets exist in our Solar System, the physical nature of super-Earths is largely unknown.


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Message 1460316 - Posted: 3 Jan 2014, 15:59:35 UTC - in response to Message 1455451.  

What do you all think is an essential parameter and it's range for intelligent life to form.


I have added the existence of volcanoes to the list of essential parameters. This is the source of Carbon Dioxide which is essential to get life going on land and sea.
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Message 1460330 - Posted: 3 Jan 2014, 16:38:19 UTC - in response to Message 1453554.  

At the same density as the Earth; a planet with twice the radius of the Earth would have 8 times the gravity

8 times the mass, not 8 times the gravity. The relationship between the two isn't linear.

where m = mass, r = radius, G = gravitational constant (6.673e-11)

and where we assume the planet has twice earth's radius and 8 times mass:

g = mG/r^2

g = (4.78e25 kg) * (6.673e-11 Nm^2/kg^2) / 1.26e7m^2

g = 20.08m/s^2

which is just over 2 X earth's standard gravity
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Message 1460331 - Posted: 3 Jan 2014, 16:38:24 UTC - in response to Message 1460316.  

What do you all think is an essential parameter and it's range for intelligent life to form.


I have added the existence of volcanoes to the list of essential parameters. This is the source of Carbon Dioxide which is essential to get life going on land and sea.


Then I'm thinking of the theory of life originating from the collision of 2 celestial bodies...
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Message 1460388 - Posted: 3 Jan 2014, 20:32:43 UTC - in response to Message 1460331.  
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What do you all think is an essential parameter and it's range for intelligent life to form.


I have added the existence of volcanoes to the list of essential parameters. This is the source of Carbon Dioxide which is essential to get life going on land and sea.


Then I'm thinking of the theory of life originating from the collision of 2 celestial bodies...


Not necessarily. If we use the solar system as an example then volcanoes on rocky planets would be very common. Earth has volcanoes, as did Mars and Venus has an estimated 1500 active volcanoes and there is considerable evidence that Mercury had volcanoes in the distant past.

I'd be surprised to find rocky, roughly Earth sized planets that didn't have volcanoes at least somewhere in their history.
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Message 1460623 - Posted: 4 Jan 2014, 19:01:42 UTC - in response to Message 1460388.  

What do you all think is an essential parameter and it's range for intelligent life to form.


I have added the existence of volcanoes to the list of essential parameters. This is the source of Carbon Dioxide which is essential to get life going on land and sea.


Then I'm thinking of the theory of life originating from the collision of 2 celestial bodies...


Not necessarily. If we use the solar system as an example then volcanoes on rocky planets would be very common. Earth has volcanoes, as did Mars and Venus has an estimated 1500 active volcanoes and there is considerable evidence that Mercury had volcanoes in the distant past.

I'd be surprised to find rocky, roughly Earth sized planets that didn't have volcanoes at least somewhere in their history.



True, but it could be not every rocky planet has a liquid and spinning core I think.
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Message boards : SETI@home Science : Planet Hunters Report Record-Breaking Discovery, Search for other habitable planets


 
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