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Started By
Message
re: NASA: new solar system , Trappist-1 ,where life may have evolved on 3 planets
Posted on 2/22/17 at 9:02 pm to MississippiLSUfan
Posted on 2/22/17 at 9:02 pm to MississippiLSUfan
quote:
No. There are moons in our own solar system with an abundance of methane and no proven life. Or even a chance of life.
To be fair, they're all well outside of the Goldilocks zone, so we would know not to look there.
1
Posted on 2/22/17 at 9:03 pm to navy
quote:
run up enough debt such that we can build a bridge
Sounds eerily familiar...
This post was edited on 2/22/17 at 9:04 pm
Posted on 2/22/17 at 9:04 pm to ThinePreparedAni
I'll help pay to send Sen Elizabeth Warren there. 
Posted on 2/22/17 at 9:04 pm to MississippiLSUfan
quote:
No. There are moons in our own solar system with an abundance of methane and no proven life. Or even a chance of life.
That's correct. But methane gives a very good indication for life. I will quote an article from AstroBiology Magazine: LINK
quote:
Even today, Mars may be releasing methane. This highlights a key fact: while most of the methane on Earth comes from living organisms, other sources exist.
Abiogenic methane arises when volcanically heated water reacts with rocks that contain high levels of iron and magnesium. Because of the heating, hydrogen in the water is liberated. That free hydrogen then meets with carbon from carbon dioxide dissolved in the water. The result is life-form-free methane. These kinds of reactions occur on Earth at mid-oceanic ridges and may occur in mantle as well, where iron is subjected to intense heating, sometimes in the presence of water. Such reactions may be responsible for the recorded methane releases from Mars.
So while not all that makes methane is life, the overwhelming majority of known methane sources are alive. This makes methane a great potential biomarker for finding life on other planets: from the bottom of the sea to the thin-aired mountaintops here, there and everywhere. Knowing that methane exists in the atmosphere of a planet serves another life-related function as well: can help us understand the surface temperature of an exoplanet.
Posted on 2/22/17 at 9:04 pm to PNW
Perhaps the Mexicans will pay to fund NASA....if they are not too busy with Muslim outreach.
Posted on 2/22/17 at 9:05 pm to MIZ_USA
(no message)
This post was edited on 1/10/21 at 8:04 pm
Posted on 2/22/17 at 9:10 pm to The Baker
quote:
We only have 1 data point.
No, we have a trillion billion to one statistic here. What are the chances that we are the only planet with life with a trillion billion other planets. I'd go with that as being pretty slim, especially since Mars is naturally producing methane and Europa has a subterranean ocean with conditions that is where early life most likely arose from on this planet.
There is evidence of life on other worlds in our own solar system, nevertheless the entire universe.
This post was edited on 2/22/17 at 9:12 pm
Posted on 2/22/17 at 9:11 pm to OMLandshark
quote:
This is the part I don't understand. How can they possibly know what the composition of the atmosphere is? From a distance it seems Venus would be much more likely to hold life than Mars for example.
Light spectra also known as spectroscopy. Certain wavelengths of light interact with matter in a certain way that reveals its chemical composition. LINK
This post was edited on 2/22/17 at 9:15 pm
Posted on 2/22/17 at 9:12 pm to ThinePreparedAni
NASA's annual fund-raising drive.
Posted on 2/22/17 at 9:12 pm to OMLandshark
I have a feeling that NASA already knows intelligent alien life exists.
Posted on 2/22/17 at 9:13 pm to AUstar
quote:
Light spectra also known as spectroscopy. Certain wavelengths of light interact with matter in a certain way that reveals its chemical composition.
But I thought it was more looking at how the planet affects the star. I don't see why we would get any discernible light from it.
Posted on 2/22/17 at 9:14 pm to OMLandshark
quote:
To be fair, they're all well outside of the Goldilocks zone, so we would know not to look there.
Actually, I think that at least one of Jupiter's moons would be an excellent place to look for life. Imagine an ocean world with a miles thick ice crust that is heated by gravitational tides from the enormous pull of a gas giant. Occasionally vented by volcanoes that are caused by that pull.
That would be an extremely violent and ever changing environment but an interesting place to look.
I think that NASA is worth every penny but is looking too far away.
Posted on 2/22/17 at 9:16 pm to MississippiLSUfan
quote:
Actually, I think that at least one of Jupiter's moons would be an excellent place to look for life. Imagine an ocean world with a miles thick ice crust that is heated by gravitational tides from the enormous pull of a gas giant. Occasionally vented by volcanoes that are caused by that pull.
Yeah, Europa, but it has no atmosphere and doesn't produce methane. Yes I think it would be great to find life there, but we're centuries away from developing the technology to actually find it, unless someone decides to literally light Jupiter on fire.
I'd say it's much more feasible we find life in another solar system before we find it on Europa. The life is buried under 80 miles of ice, if it exists at all.
This post was edited on 2/22/17 at 9:18 pm
Posted on 2/22/17 at 9:17 pm to ThinePreparedAni
Tidal forces earth size bodies that close together would exert on each other would make things rough
Lots of volcanic and seismic activity, not to mention tides might cover continents
Lots of volcanic and seismic activity, not to mention tides might cover continents
This post was edited on 2/22/17 at 9:18 pm
Posted on 2/22/17 at 9:18 pm to OMLandshark
quote:
quote: We only have 1 data point. No, we have a trillion billion to one statistic here. What are the chances that we are the only planet with life with a trillion billion other planets. I'd go with that as being pretty slim, especially since Mars is naturally producing methane and Europa has a subterranean ocean with conditions that is where early life most likely arose from on this planet. There is evidence of life on other worlds in our own solar system, nevertheless the entire universe.
Its true the odds are astronomical that there is life in the unjverse, the majority are to far for us to ever know, we probably have to hope one of these life baring planets are within a few light years for us to ever be able to study or hopefully one day interact with.
Posted on 2/22/17 at 9:18 pm to AU66
quote:
Yeah i get that, but if its a statistical certainty and there are hundreds of life bearing planets some much older than ours i would think some would surpass us in technology and we would be picking up radio waves or some type of space noise that would indicate intelligent life.
There are a lot of theoretical answers to this, the absence of life in the Universe (to our current observation) is called Fermi's Paradox.
One answer is that non-directed radio waves don't actually travel that far before breaking down into static.
Posted on 2/22/17 at 9:28 pm to OMLandshark
(no message)
This post was edited on 1/10/21 at 8:04 pm
Posted on 2/22/17 at 9:29 pm to MississippiLSUfan
I believe that it is the utmost of arrogance and inflated self importance to be of the opinion that we are somehow unique.
The next time that you are on a beach reach down past your cold beer and pick up a handful of sand. And really look at what is in your hand. Then imagine all of the grains of sand on all of the beaches in the world as suns. That's just our galaxy. Then expand that thought further to a nearly indescribable number of galaxies.
We aren't alone. The problem is space between everything. I've no doubt that there are billions of other civilizations out there. But, unless something really extraordinary happens before we are hit by an asteroid, or blow ourselves up, we won't ever know for sure.
Just my opinion. And I'm not very smart.
The next time that you are on a beach reach down past your cold beer and pick up a handful of sand. And really look at what is in your hand. Then imagine all of the grains of sand on all of the beaches in the world as suns. That's just our galaxy. Then expand that thought further to a nearly indescribable number of galaxies.
We aren't alone. The problem is space between everything. I've no doubt that there are billions of other civilizations out there. But, unless something really extraordinary happens before we are hit by an asteroid, or blow ourselves up, we won't ever know for sure.
Just my opinion. And I'm not very smart.
Posted on 2/22/17 at 9:32 pm to ThinePreparedAni
I like these threads on here because it shows what the general consensus on scientific issues are around here.
Posted on 2/22/17 at 9:36 pm to saint tiger225
It's not hard... There is a set of conditions that make these planets viable.
They are within habitable range of their sun (not too hot, not too cold)
They have similar mass to earth
It's science
The star that these planets orbit is 1/10 the size of our sun, so the planets are closer to their sun than we are. But it is the right temperature to sustain life.
They are within habitable range of their sun (not too hot, not too cold)
They have similar mass to earth
It's science
The star that these planets orbit is 1/10 the size of our sun, so the planets are closer to their sun than we are. But it is the right temperature to sustain life.
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