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Has Kepler Discovered an Alien Megastructure?

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Re: What if?? Giant Alien 'Megastructures' Orbiting Star?

Postby GregT » Fri 16 Oct 2015, 02:08:21

So there might actually be an intelligent species somewhere in our universe. Great news! I'd pretty much given up all hope.
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Re: What if?? Giant Alien 'Megastructures' Orbiting Star?

Postby SeaGypsy » Fri 16 Oct 2015, 03:07:04

I think your 200 year science conversation is off by at least a factor of 10. If you don't think making & perfecting glass requires science, you are deluded & the Egyptians spent nearly 2000 years before Christ working out the details before Romans invented the Iron blowpipe around 50 AD. Have a gander at the 'Portland Vase'. Science is a great long conversation, as prone as any other to cultural bias.
I prefer to take the quantum position on these matters with a wee pinch of organic sea salt. The fatalists are both right & wrong depending on your view of the unknowable total- they want to keep their view, their language, their power structure etc so they call it inevitable- ie. The MIC is a natural & unavoidable affect of intelligence- they are fucking idiots & they can fuck off & live on KJs feigging doughnut- dick heads.
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Re: Has Kepler Discovered an Alien Megastructure?

Postby Sixstrings » Fri 16 Oct 2015, 10:50:13

$this->bbcode_second_pass_quote('Keith_McClary', '')$this->bbcode_second_pass_quote('Sixstrings', 'I')'d like to hear more exact detail about the transits.
...
The articles posted on this are bit light on detail and explanation, but if I'm understanding it right aren't they saying they looked at the star for 4 years and then NOW these things show up? So that wouldn't be a planet. It's something that just went into orbit around that star (new alien construction, or traveling aliens). Unless it's got a 4 year orbit, but that's not possible, nothing so far out to have a 4 year orbit could be blocking its star by 22%!
The paper is on arxiv.org :
Planet Hunters X.
KIC 8462852 – Where’s the flux? ?


Thank you, Keith. Newspaper articles are useless.

It's better to just read the scientific paper, itself:

$this->bbcode_second_pass_quote('', 'H')owever, of the various considered, we find that the break-up
of a exocomet provides the most compelling explanation.
Observations of KIC 8462852 should continue to aid in unraveling
its mysteries. First and foremost, long-term photometric
monitoring is imperative in order to catch future dipping events.

It would be helpful to know whether observations reveal no further
dips, or continued dips. If the dips continue, are they periodic? Do
they change in size or shape? On one hand, the more dips the more
problematic from the lack of IR emission perspective. Likewise, in
the comet scenario there could be no further dips
; the longer the
dips persist in the light curve, the further around the orbit the fragments
would have to have spread

...

Several of the proposed scenarios are ruled out by the lack of
observed IR excess (Section 2.4), but the comet scenario requires
the least.


So there ya go.

Further observation will answer the questions -- whether the light blockage continues, or if that was it, and if the dips continue then what will the occlusion rate be and frequency etc.
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Re: What if?? Giant Alien 'Megastructures' Orbiting Star?

Postby Newfie » Fri 16 Oct 2015, 10:53:23

MODS, ANY CHANCE YOU COULD MERGE THE TWO THREADS?

[ sjn - done ]
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Re: What if?? Giant Alien 'Megastructures' Orbiting Star?

Postby Gsearch » Fri 16 Oct 2015, 11:21:29

I think interstellar and interplanetary travel will be much easier and simpler than we think. It's a risky endeavor, and we all know how the more complex something is, the weaker, more inferior, more likely to fail it is. If your machine breaks down you're basically dead.

It will probably have something to do with electromagnetism induced gravity and perhaps harnessing cosmic radiation and converting it directly to energy. It's probably very, very simple and easy to make. There have been too many reliable eyewitness sightings of UFOs all around the world for some governments, probably Nazi Germany, USA and Soviet Union not to have had them.
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Re: What if?? Giant Alien 'Megastructures' Orbiting Star?

Postby Tanada » Fri 16 Oct 2015, 12:07:07

$this->bbcode_second_pass_quote('Apneaman', 'O')nly 1500 light years away?


light year
noun ASTRONOMY
a unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 trillion miles).

If they somehow managed to survive their technological infancy, they might be aware of us. I saw a picture the other day of light from a galaxy from 13 billion years ago and were still in diapers. Imagine if a highly technological species had been that way for a million years? I bet they could beam us solutions but they hate Ferengies, so were on our own.


You are forgetting any radio signals emitted from our civilization would need 1500 years before they could possibly be detected by your hypothetical advanced aliens. Given that radio is just over 100 years old the soonest they would notice us will be 1400 years in the future.
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Re: Has Kepler Discovered an Alien Megastructure?

Postby Cid_Yama » Sat 17 Oct 2015, 21:58:48

It could have been something passing closer to us, between us and the star system. It didn't have to be in that star system, meaning it didn't have to be that large.

If it happens again, first guess would be something in our system, like an undiscovered planet or large asteroid.
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Re: Has Kepler Discovered an Alien Megastructure?

Postby Sixstrings » Sun 18 Oct 2015, 05:15:36

$this->bbcode_second_pass_quote('Cid_Yama', 'I')t could have been something passing closer to us, between us and the star system. It didn't have to be in that star system, meaning it didn't have to be that large.

If it happens again, first guess would be something in our system, like an undiscovered planet or large asteroid.


I don't know exactly how it all works, but somehow they are able to determine the distance of light-blocking objects, from the star, in the deep field study.

So, when it's a planet, they figure out how far out its orbit is, deduce if it's rock or gas, etc.

I don't think it's possible something could be floating by between here and there and not even in the deep field.

What I find interesting is that this thing is unique (the database is massive, and whatever is going on with this star is *unique* in that entire database). If it were a comet cluster, one would think that would have been seen before.

$this->bbcode_second_pass_quote('', 'I')t doesn’t look at all like the planetary transit events Kepler was built to detect — these will cause a star to dim periodically, by about 1% at most. As far as astronomers can tell, there’s nothing else like KIC 846285 in the Kepler database.


Whatever the objects are, they are very large and have "complex" shapes:

$this->bbcode_second_pass_quote('', '')I’m still stumped about what could be going on,” Wright told me in an email. “But something is clearly orbiting the star, and whatever they are, they are very large and have complex shapes.”

...

“We have learned most stars have planets, that Earth sized planets are common, and a good fraction are in the habitable zone of their star,” lead Kepler investigator Bill Borucki said at an exoplanet conference I attended this past May. “And when you put the numbers together: 100 billion stars, 10 percent with Earth-sized planets, 10 percent stars like the sun, that’s a billion Earth-sized planets in the habitable zone of stars like the sun.

The Kepler mission has literally revolutionized our view of the cosmos. Thirty years ago, we weren’t sure there were any Earth-like planets beyond our solar system, now, there could be a billion. The possibility of finding life beyond Earth is no longer a pipe dream.
http://gizmodo.com/aliens-or-not-theres-still-a-lot-to-discover-in-nasas-1737062081
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Re: Has Kepler Discovered an Alien Megastructure?

Postby Sixstrings » Sun 18 Oct 2015, 05:41:43

There's a chance it could be some previously unknown phenomenon, like how when pulsars were first discovered. If it were a dyson shell, like the pic below, that would block the light in "complex" and strange patterns:

$this->bbcode_second_pass_quote('', 'A')RE THOSE REALLY ALIEN MEGASTRUCTURES? HOW ASTRONOMERS PLAN TO INVESTIGATE
THERE'S SOMETHING WEIRD HAPPENING AROUND A FARAWAY STAR.

Image
Illustration of a Dyson Shell

Siemion and his colleagues Jason Wright and Tabetha Boyajian think there's a chance that a structure like that could be blocking the light from KIC 8462852. And it wouldn't necessarily have to be solar panels either, says Wright. If there's a structure there, it could be a telescope or some sort of habitation.

To test their hypothesis, the team hopes to listen for the tell-tale signs of life around KIC 8462852. They've applied for time on the Green Bank Telescope in West Virginia. They'll be competing with other scientists who want to use the giant telescope to answer other research questions. If their application is selected, next year the team will point the telescope's 100-meter dish toward KIC 8462852 and scan the radio signals emitting from that region.

“If we heard narrow-band modulated radio emissions coming from that star, I can't imagine any other explanation,” says Wright, an astronomer at Penn State. No known natural phenomenon creates a radio signature like that.

...

Jon Jenkins from the Kepler team says he's never seen anything like what's happening at KIC 8462852, but "it’s not unusual for new phenomena to be greeted with an explanation calling for extraterrestrials that later prove to be due to more mundane but novel natural phenomena."
Siemion himself points out that when the first pulsar was discovered in 1961, it was given the designation LGM-1, for “little green men.” Like lighthouses of the universe, these rotating stars emit radio waves and other electromagnetic radiation at regular intervals.
http://www.popsci.com/alien-megastructures-how-astronomers-plan-to-investigate
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Re: Has Kepler Discovered an Alien Megastructure?

Postby Cog » Sun 18 Oct 2015, 06:26:52

Perhaps there is a forum there called Peak Dyson Sphere, where people have argued for millions of years about the damaging effects of the sphere and how it would have been better to never have built it.
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Re: Has Kepler Discovered an Alien Megastructure?

Postby Keith_McClary » Sun 18 Oct 2015, 12:30:34

$this->bbcode_second_pass_quote('Cog', 'P')erhaps there is a forum there called Peak Dyson Sphere, where people have argued for millions of years about the damaging effects of the sphere and how it would have been better to never have built it.
Dyson Sphere Inc. has been skimping on maintenance for the last few millennia and now it is beyond repair. DSI has filed for bankruptcy. The gubmint can't afford to replace it because of the financial crisis of the last few centuries. Even if they could, nobody knows how to demolish the thing, and what would we do for energy during the estimated 150 year reconstruction process?
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Re: Has Kepler Discovered an Alien Megastructure?

Postby Keith_McClary » Sun 18 Oct 2015, 12:42:02

$this->bbcode_second_pass_quote('Cid_Yama', 'I')t could have been something passing closer to us, between us and the star system. It didn't have to be in that star system, meaning it didn't have to be that large.

If it happens again, first guess would be something in our system, like an undiscovered planet or large asteroid.
These events were observed over four years.
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Re: Has Kepler Discovered an Alien Megastructure?

Postby Plantagenet » Sun 18 Oct 2015, 17:46:46

Perhaps we can learn something from Kepler's apparent discovery of a technologically advanced alien artifact.

If aliens successfully built a Dyson sphere to capture solar energy and power their civilization, perhaps we should be thinking seriously about doing the same thing.

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Re: Has Kepler Discovered an Alien Megastructure?

Postby Cog » Sun 18 Oct 2015, 18:07:26

I'm having difficulty understanding how a Dyson sphere has gravity except if it rotates on its axis and that would only be at the equator of the rotation. And what about a breathable atmosphere? Wouldn't that breathable atmosphere burn up when it contacted the star? Wouldn't a race capable of creating a sphere that large just create new planets that circle the star at a habitable distance?
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Re: Has Kepler Discovered an Alien Megastructure?

Postby Plantagenet » Sun 18 Oct 2015, 18:55:01

$this->bbcode_second_pass_quote('Cog', 'W')ouldn't a race capable of creating a sphere that large just create new planets that circle the star at a habitable distance?


If its aliens then the aliens don't want another planet. They want an energy array to power their civilization on its existing planet.

1. The thing found by Kepler doesn't seem to be a complete "Dyson Sphere" i.e. it doesn't seem to be a complete sphere enclosing a star. It was found because the sun's light was episodically dimmed, probably by some kind of extremely large structure in space near the sun sometimes blocking the sun and sometimes not. Perhaps the aliens just built a very large energy array in outer space near their home planet, for instance, and then rigged a very long extension cord back to their planet with lots out outlets so everyone could plug into it. 8)

2. Rather then creating new planets, a huge outer space energy array probably required the destruction of asteroids, etc. to get enough raw materials to build it. The array would be specifically for gathering solar energy----so a planet won't work---- a dyson sphere or a partial sphere has a huge amount of surface area and will capture much much more solar energy than a typical planet.

Image
Its probably not a complete Dyson sphere---maybe more like an array of these things
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Re: Has Kepler Discovered an Alien Megastructure?

Postby Subjectivist » Sun 18 Oct 2015, 19:30:57

$this->bbcode_second_pass_quote('Cog', 'I')'m having difficulty understanding how a Dyson sphere has gravity except if it rotates on its axis and that would only be at the equator of the rotation. And what about a breathable atmosphere? Wouldn't that breathable atmosphere burn up when it contacted the star? Wouldn't a race capable of creating a sphere that large just create new planets that circle the star at a habitable distance?


If you build the Dyson sphere close around the sun the stars gravity will pull everything down to the outer surface. Cover the surface with water except where the people live about 300 feet deep. Line the bottom of the water with light ports the appropriate distance apart to provide the same light level as would be seen on the surface of a planet. You can vary the ocean depth as needed for life forms that live in the deeper parts on your home world. Across the surface you can put machinery to collect energy from the water vapor condensing off the surface raining back down.
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Re: Has Kepler Discovered an Alien Megastructure?

Postby Cog » Mon 19 Oct 2015, 05:23:01

From the article, this array would be larger than Jupiter. Just how much energy do these energy hog aliens have to use on their planet? Do they run their air conditioners all the time? They sound just like Americans so I am starting to warm up to them already.
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Re: Has Kepler Discovered an Alien Megastructure?

Postby vox_mundi » Mon 18 Jan 2016, 12:43:28

That 'Alien Megastructures' Star Continues to Defy Explanation

$this->bbcode_second_pass_quote('', 'T')he leading theory has been that the star is periodically occulted by a huge cluster of comets that block out light from our perspective—sometimes as much as 20 percent.

But Bradley Schaefer, a prolific astrophysicist and professor based at Louisiana State University, has thrown a wrench into the comet hypothesis with a paper published last week on arxiv.

It is not just Schaefer’s conclusions, but his methods, that make this new research so interesting. By sifting through Harvard College Observatory’s collection of historic glass photographic plates—an archive that dates back to the 1880s and consists of about 500,000 samples—Schaefer was able to reconstruct the history of KIC 8462852’s light fluctuations as far back as the 1890s.

$this->bbcode_second_pass_quote('', ' ') As it turns out, KIC 8462852 is not only subject to extreme light fluctuations in the short term, but a longer gradual dimming that has been beautifully recorded in the glass annals housed at Harvard.

Based on the rate at which the star’s light curve is waning, Schaefer calculated that it would take a glut of about 648,000 massive comets with diameters of at least 200 kilometres to account for the observed fluctuations. That is an extremely unlikely scenario that is almost as far-fetched as the alien gambit. “This fading is what has the deep implications, like refuting many of the proposed models, including the comet-family model, as well as the extreme speculations,” Schaefer said.
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Re: Has Kepler Discovered an Alien Megastructure?

Postby vox_mundi » Mon 18 Jan 2016, 16:51:20

I’m STILL Not Sayin’ Aliens. But This Star Is Really Weird.

$this->bbcode_second_pass_quote('', '.').. check out the Graph from Schaefer, 2016
http://arxiv.org/abs/1601.03256

That’s… bizarre. Tabby’s Star is, by all appearances, a normal F-type star: hotter, slightly more massive, and bigger than our Sun. These stars basically just sit there and steadily turn hydrogen into helium. If they change, it’s usually on a timescale of millions of years, not centuries. Schaefer examined two other similar stars in the survey, and they remained constant in brightness over the same time period.

The long-term fading isn’t constant, either. There have been times where the star has dimmed quite a bit, then brightened up again in the following years. On average, the star is fading about 16 percent per century, but that’s hardly steady.

So it appears Tabby’s Star dims and brightens again on all kinds of timescales: hours, days, weeks, even decades and centuries.

... Now, again, let me be clear. I am NOT saying aliens here. But, I’d be remiss if I didn’t note that this general fading is sortof what you’d expect if aliens were building a Dyson Swarm. As they construct more of the panels orbiting the star, they block more of its light bit by bit, so a distant observer sees the star fade over time.
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