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Old February 22nd, 2017, 06:49 PM   #21
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This star is 39 light years away. The light from 1978 is available to them, All in the Family and Love Boat time!!
well, at least we keep them laughing..

that and the polyester leisure suits, lol..
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Old February 22nd, 2017, 07:00 PM   #22
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Seems like it's just a matter of time before life turns up somewhere else besides earth.
Major Discovery! 7 Earth-Size Alien Planets Circle Nearby Star

Astronomers have never seen anything like this before: Seven Earth-size alien worlds orbit the same tiny, dim star, and all of them may be capable of supporting life as we know it, a new study reports.

"Looking for life elsewhere, this system is probably our best bet as of today," study co-author Brice-Olivier Demory, a professor at the Center for Space and Habitability at the University of Bern in Switzerland, said in a statement.

The exoplanets circle the star TRAPPIST-1, which lies just 39 light-years from Earth — a mere stone's throw in the cosmic scheme of things. So speculation about the alien worlds' life-hosting potential should soon be informed by hard data, study team members said.

"We can expect that, within a few years, we will know a lot more about these planets, and with hope, if there is life there, [we will know] within a decade," co-author Amaury Triaud, of the Institute of Astronomy at the University of Cambridge in England, told reporters on Tuesday (Feb. 21).
More: Major Discovery!*7 Earth-Size Alien Planets Circle Nearby Star
Proxima Centuri is the closest star to Earth excluding the Sun that has a planet the size of Earth. There is serious doubt that planet can support life.

There is another red dwarf star a little further away and in a different direction that has several Earth sized planets in the Goldilocks Zone that could support life.
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Old February 22nd, 2017, 07:17 PM   #23
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Proxima Centuri is the closest star to Earth excluding the Sun that has a planet the size of Earth. There is serious doubt that planet can support life.

There is another red dwarf star a little further away and in a different direction that has several Earth sized planets in the Goldilocks Zone that could support life.
The planet's existence has come to be doubted.
Gliese 581g: Potentially Habitable Planet — If It Exists

Gliese 581g is an extra-solar planet candidate within a planetary system that is only 20 light-years from Earth, but at this point it is highly doubted to exist. First announced in 2010 as a planet close to Earth's mass in the habitable zone of its host star, the exoplanet has come under scrutiny as other research teams cast doubts on its discovery.

While thousands of exoplanet candidates have been discovered, it generally takes at least two independent observations to confirm that these planets actually exist. To be scientifically rigorous, the planet should be observed by two separate teams using two different observatories. The original researchers that found Gliese 581g in 2010, however, defended their methods in 2012 and cast doubts on some of the other teams' work.

At least one well-known exoplanet database doesn't list it any more. The planet is not currently listed in the Habitable Exoplanets Catalog, which is run by the University of Puerto Rico at Arecibo's Planetary Habitability Laboratory. In an October 2014 blog post characterizing “false starts” in exoplanet habitability, researcher Abel Mendez wrote that the planet does not exist
More for ya: Gliese 581g: Potentially Habitable Planet ? If It Exists
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Old February 22nd, 2017, 07:41 PM   #24
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The planet's existence has come to be doubted.
Gliese 581g: Potentially Habitable Planet — If It Exists

Gliese 581g is an extra-solar planet candidate within a planetary system that is only 20 light-years from Earth, but at this point it is highly doubted to exist. First announced in 2010 as a planet close to Earth's mass in the habitable zone of its host star, the exoplanet has come under scrutiny as other research teams cast doubts on its discovery.

While thousands of exoplanet candidates have been discovered, it generally takes at least two independent observations to confirm that these planets actually exist. To be scientifically rigorous, the planet should be observed by two separate teams using two different observatories. The original researchers that found Gliese 581g in 2010, however, defended their methods in 2012 and cast doubts on some of the other teams' work.

At least one well-known exoplanet database doesn't list it any more. The planet is not currently listed in the Habitable Exoplanets Catalog, which is run by the University of Puerto Rico at Arecibo's Planetary Habitability Laboratory. In an October 2014 blog post characterizing “false starts” in exoplanet habitability, researcher Abel Mendez wrote that the planet does not exist
More for ya: Gliese 581g: Potentially Habitable Planet ? If It Exists
There is also doubt that Proxima Centuri is part of the Alpha Centuri system and may be a wandering star. Sirius A, the dog star, is a blue giant and the brightest star in the sky and not too far away from us that will go Super Nova in the future which will wipe out terrestrial life on Earth.
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Old February 22nd, 2017, 07:55 PM   #25
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They just make this stuff up.
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Old February 22nd, 2017, 08:13 PM   #26
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They just make this stuff up.
It is something to think about. To put myself to sleep think about walking on the surface of a neutron star and drop a golf ball one yard above the surface. The golf ball hits at 4 million miles per hour. I know that scenario is impossible and only a mind experiment. One cubic centimeter of neutron star material weighs one billion tons and the crust is one billion times stronger than steel. Then I imagine a pulsar and magnatar and wonder what I would see walking on the surface of those two bad boys.
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Old February 22nd, 2017, 08:19 PM   #27
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It is something to think about. To put myself to sleep think about walking on the surface of a neutron star and drop a golf ball one yard above the surface. The golf ball hits at 4 million miles per hour. I know that scenario is impossible and only a mind experiment. One cubic centimeter of neutron star material weighs one billion tons and the crust is one billion times stronger than steel. Then I imagine a pulsar and magnatar and wonder what I would see walking on the surface of those two bad boys.
I don't give any more credit to this stuff than I do the multiverse, the holographic universe or ancient aliens
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Old February 22nd, 2017, 08:40 PM   #28
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I don't give any more credit to this stuff than I do the multiverse, the holographic universe or ancient aliens
I took Physics in High School and the greatest thing I learned was Newton's Law of Universal Gravitation where I also learned scientific notion. I was never good at math unless I could apply it to something real.
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Old February 22nd, 2017, 10:36 PM   #29
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All day long, since I posted an earlier comment, I keep hearing the same buzzwords in the media...and finding them here also about this new planet discovery: "habitable, habitable, habitable..." And like I said before, not many people except for biologists, are going to get overly excited about the discovery of extraterrestrial bacteria! And there's that big difference between having conditions that allow carbon molecules to turn into simple, self-replicating lifeforms vs what's needed to support a world that's just right for complex, multicellular organisms.

I pointed out earlier that paleontologists make a clear distinction between the almost three billion years Earth was a microbial world, compared to the past billion years of having conditions right in order to allow the formation of complex lifeforms that could advance towards something that could develop technologies and send messages about itself into space.

An essential first step was simple, photosynthesizing plants which had to arise first to break down CO2 and start pumping oxygen into the atmosphere. Our star has been slowly, but gradually increasing in intensity for the past 4.5 billion years, so a billion years ago, Earth was receiving enough heat from the Sun to maintain liquid water on the surface with an oxygenated atmosphere. Early on, all that carbon dioxide and methane was essential to trap more heat.

And, just as the age of complex, multicellular life on Earth is a relatively brief period...only really taking off about 5 to 6 hundred million years ago; if we look 5 hundred million years into the future of life on Earth (assuming humans don't destroy it first), the favourable conditions that have allowed complex life are breaking down...a hotter sun and increased amounts of water vapour in the atmosphere leads to increased 'rock weathering' which washes carbon out of the atmosphere and sequesters it in carbonaceous rocks. CO2 levels are declining below 150 ppm and making it difficult to sustain photosynthesis, and the carbon cycle that transfers carbon from rocks and the oceans to the atmosphere and back again comes to an end. Later still, the oceans have pretty much boiled away before an expanding sun ends the last microbial life left on Earth. So, if Earth lasts another 4 to 5 billion years before the Sun swallows it up, it will still mean that only a tenth of Planet Earth's lifespan was spent hosting complex life that can build civilizations and develop technologies.

At least that's how Ward and Brownlee pictured the rise and eventual end of the golden age of life on Earth in their followup book: The Life And Death of Planet Earth:
https://www.amazon.com/Life-Death-Pl.../dp/0805075127
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Old February 23rd, 2017, 10:59 AM   #30
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One question I have is: If this system has planets very close to its sun, and the sun was very hot and has since cooled off a whole hell of a lot, did all the water boil off into space in past eons?

If so life as we know it would be impossible.
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