Celestial The Strange Star that has Serious Scientists Talking about an Alien Megastructure

packyderms_wife

Neither here nor there.
The strange star that has serious scientists talking about an alien megastructure

http://www.washingtonpost.com/news/morning-mix/wp/2015/10/15/the-strange-star-that-has-serious-scientists-talking-about-an-alien-megastructure/

“It was kind of unbelievable that it was real data,” said Yale University astronomer Tabetha Boyajian. “We were scratching our heads. For any idea that came up there was always something that would argue against it.”

She was talking to the New Scientist about KIC 8462852, a distant star with a very unusual flickering habit. Something was making the star dim drastically every few years, and she wasn’t sure what.

Boyajian wrote up a paper on possible explanations for the star’s bizarre behavior, and it was published recently in the Monthly Notices of the Royal Astronomical Society. But she also sent her data to fellow astronomer Jason Wright, a Penn State University researcher who helped developed a protocol for seeking signs of unearthly civilization, wondering what he would make of it.

To Wright, it looked like the kind of star he and his colleagues had been waiting for. If none of the ordinary reasons for the star’s flux quite seemed to fit, perhaps an extraordinary one was in order.

Aliens.

Or, to be more specific, something built by aliens — a “swarm of megastructures,” as he told the Atlantic, likely outfitted with solar panels to collect energy from the star.

[No, we haven’t discovered alien megastructures around a distant star]

“When [Boyajian] showed me the data, I was fascinated by how crazy it looked,” Wright said. “Aliens should always be the very last hypothesis you consider, but this looked like something you would expect an alien civilization to build.”

To be sure, both Boyajian and Wright believe the possibility of alien megastructures around KIC 8462852 is very, very remote. It’s worthy of hypothesis, Wright told Slate, “but we should also approach it skeptically.”

Yet compared to the vast majority of supposed sightings of signs of extraterrestrial life, this one has some credibility. Here’s why:

KIC 8462852 was discovered through Planet Hunters, a citizen science program launched at Yale University in 2010. Using data from the Kepler Space Telescope, volunteers sift through records of brightness levels from roughly 150,000 stars beyond our solar system.

Ordinarily, planet hunters are looking for the telltale drops in brightness that happen when a planet crosses in front of its sun. That’s how we identify planets now — brief interruptions in the progress of light as it makes its way toward Earth. Not a presence, but an absence. Already the project has uncovered a few confirmed planets and at least several dozen more planet candidates.

But one finding from the program was unlike anything else scientists had ever seen. Volunteers marked it out as unusual in 2011, right after the program started: a star whose light curves seemed to dip tremendously at irregular intervals. At one point, about 800 days into the survey, the star’s brightness dropped by 15 percent. Later, around day 1,500, it dropped by a shocking 22 percent. Whatever was causing the dips, it could not have been a planet — even a Jupiter-sized planet, the biggest in our solar system, would only dim this star by 1 percent as it transited across, Slate reported. (The Kepler telescope was badly damaged in 2013, so the researchers don’t have data from more recent dips, if there were any).

This artist rendition provided by NASA shows the Kepler space telescope. (NASA/AP)

Another natural force must be at work here.

In their paper, Boyajian and her colleagues went to great lengths to review and refute the more obvious explanations for the odd display. It wasn’t a mistake, caused by a problem the telescope or their data processors — they checked their data with the Kepler mission team, and found no problems for nearby stars when they checked their light curves against neighboring sources.

It wasn’t the star’s fault either. Some young stars, still in the process of accumulating mass, will be surrounded by a whirl of orbiting dust and rock and gas that can blur or block their light. But this star wasn’t young, Boyajian found. Nor did it look like other kinds of stars that demonstrate this light variability.

Something must be blocking the star’s light from the outside, the paper concluded — maybe catastrophic crashes in the asteroid belt, maybe a giant collision in the planetary system that spewed debris into the solar system, maybe small proto-planets shrouded in a Pig-Pen-like cloud of dust. But every explanation was lacking in some way, with the exception of one: Perhaps a family of comets orbiting KIC 8462852 had been disturbed by the passage of another nearby star. That would have sent chunks of ice and rock flying inward, explaining both the dips and their irregularity.

It would be “an extraordinary coincidence,” as the Atlantic put it, for that to have happened at exactly the right moment for humans to catch it on a telescope that’s only been aloft since 2009. “That’s a narrow band of time, cosmically speaking.”

Then again, KIC 8462852 itself is extraordinary. Of the 150,000 or so stars within view of the Kepler Telescope, it is the only one to flicker and dim in this unusual way.

Boyajian’s paper only looks at “natural” explanations for the phenomenon, she told the Atlantic. But she’s open to looking at unnatural ones, which is where Wright and his “swarm of megastructures” theory come in.

Scientists — at least, the ones who like to theorize about these things — have long said that an advanced alien civilization would be marked by its ability to harness the energy from its sun (rather than scrabbling over its planet’s resources like us puny earthlings). They envision something like a Dyson Sphere, a hypothetical megastructure first proposed by physicist Freeman Dyson that would orbit or even encompass a star, capturing its power and putting it to use.

Obviously, a Dyson sphere has never been spotted in real life, though they’re all over science fiction. But if one were to exist, it wouldn’t look like a metal ball around the sun — it would probably comprise a chain of smaller satellites or space habitats, something that would block its star’s light as weirdly and irregularly as the light of KIC 8462852 has been blocked. That’s why researchers who are interested in finding alien life are so excited about the finding.

Boyajian, Wright and Andrew Siemion, the director of the Search for Extraterrestrial Intelligence Research Center at the University of California, Berkeley, are now working on getting access to the massive radio dishes they can point at the star in search of the kinds of radio waves usually emitted by technology.

If they find them — well, that would be very big and very, very unlikely news.

Of course, the star in question is about 1,481 light-years away from Earth — meaning that even if aliens did create a giant solar panel complex out there, they did so in the 6th century, while we were emptying chamber pots out of second story windows and fighting off the first bubonic plague pandemic.

Quite a bit has changed on Earth since then. Who knows what could have happened around KIC 8462852?
 

Hansa44

Justine Case
Didja' ever notice when scientists come into the picture and try to act all excited, without fail they will say at the end of the article that this anomaly is a thousand or more light years away? They always add, so we don't have anything to be concerned about.

Well, I am here to say we have plenty of anomalies right in our own solar system that are far more interesting and plenty of truthful people to back up their stories and info.

They don't want to panic the masses and they're right. Too often the masses remind me of a slithering parasite and are only here to feed off of others.

And just like what's happened in the past, most of them woke up too late.

I could prove what I've seen but won't. I've seen what happens right here on TB if you try to give even a teeny bit of the truth.
 

Publius

TB Fanatic
So what they are seeing happened over a one thousand four hundred and eighty years ago, and its no longer in the same location.
 

Publius

TB Fanatic
I'm confused. Some of the astro-graph looked like elaborate animation. Is it?


Some of it yes, but the photo's taken by Hubbel is so fine in detail they can zoom in and take a tour or close the apature down and take more detailed photos one small area at a time, then put it all togher in the computer. Keep in mind the Hubbell's photo's is all CCD digtial, so its down loaded to earth to a computer.
 

Hansa44

Justine Case
OK...One of the things that really got my attention (all of it did), was when the were showing what looked like a crater on the smaller picture. And in that crater, going up the side were 3 or 4 small bright lights and they looked like they were headed to a round object sitting on the top of the crater, on the very edge. Then it got too blurry and it was changed. Typical. LOL

Those lights were in a row one above the other.
 

Housecarl

On TB every waking moment
KIC 8462852: The Plot Thickens
RT 17:33
View: https://www.youtube.com/watch?v=1omAXK5qKZw&ab_channel=JohnMichaelGodier


Sep 17, 2021
John Michael Godier
274K subscribers

An exploration of the strange happenings at the star KIC 8462852 and what they might mean.

My Patreon page: https://www.patreon.com/johnmichaelgo... My Event Horizon talk show channel: https://www.youtube.com/eventhorizonshow

Papers: "A 1,574-Day Periodicity of Transits Orbiting KIC 8462852", Sacco et al., 2018 https://app.aavso.org/jaavso/article/...

Snakes Have Legs "John Michael Godier" https://youtu.be/2SdKieLNsHk Music: Cylinder Eight by Chris Zabriskie is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/... Source: https://chriszabriskie.com/cylinders/ Cylinder Five by Chris Zabriskie is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/... Source: https://chriszabriskie.com/cylinders/
 

Telescope Steve

Veteran Member
Here is the actual conclusion reached in the paper. It is not as exciting as the alien headline. The paper looks to be well done. The cause of this dimming may take years or decades to refine.

"We presented an extensive set of scenarios to explain the occurrence of the dips, most of which are unsuccessful in explaining the observations in their entirety. However, of the various considered, we find that the break-up of a exocomet provides the most compelling explanation."

"Our most promising theory invokes a family of exocomets."
 

tanstaafl

Has No Life - Lives on TB
Several independently rotating ringworlds of different sizes around the same star! I expect you could come up with orbits that would appear "irregular" to an observer far enough away. Or maybe the aliens are "bobbing" their ringworld to give them the equivalent of seasons. :)
 

Wildweasel

F-4 Phantoms Phorever
Remember a story about “The Blivit in the B Ring”
Ring any bells?
Had to look that one up to refresh my old brain. Quite interesting to see who the author was, given his activities we know him for today. I need to re-read a lot of those stories from from back in those pre-internet days, when I was constantly reading scifi.
 
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