An artist’s conception of a Dyson sphere, or megastructure.


Image is public domain art by CapnHack

Did you see the stories late last week about the Kepler space telescope’s discovery of an oddly dimming star – some 1,500 light-years from Earth – hypothesized to harbor a potential, but far from definitely proven, alien megastructure? This week, according to Space.com, astronomers began using a radio telescope northeast of San Francisco – called the Allen Telescope Array (ATA) – to try to detect possible signals coming from the vicinity of this bizarre and now-controversial star, which is known to astronomers as


Here’s a Q & A about this story, which has captured so much attention and is still unfolding.

What is an alien megastructure? If we, as a civilization, could collect all of our sun’s energy, we’d do it with some sort of megastructure, otherwise known as a Dyson sphere or a Dyson shell. See the infographic at the bottom of this post to learn more about them. It was only a month ago that a Dutch astronomer released a statement saying in no uncertain terms that – since sensitive new telescopes now permit astronomers to detect waste heat expected from an advanced alien civilization known as a Kardashev Type III civilization, which would collect all the energy of an entire galaxy, and since no such waste heat has been detected – advanced civilizations using megastructures are very rare or entirely absent from the local universe. Taken together, the current story about a possible alien megastructure around a single star, and September’s story about the absence of megastructures on a galactic scale, don’t really add up to anything … but do help illustrate the fact that no definite sign of alien life has been detected here.

When and how did the story break about KIC 8462852? Professional astronomers analyzing data from NASA’s Kepler space telescope (a famed planet-finding telescope), and citizen scientists from the Planet Hunters crowdsourcing program, have been studying this star. They noticed it from among the 150,000 stars stars examined by Kepler, and noted that it is “strange” and “bizarre.” Tabetha Boyajian, a postdoc at Yale who oversees Planet Hunters, submitted a paper about KIC 8462852 on September 11 to the journal Monthly Notices of the Royal Astronomical Society. The paper passed mostly unnoticed until Ross Andersen published a story about it on October 13 at TheAtlantic.com. The story – titled The Most Mysterious Star in Our Galaxy – started a scramble among science media outlets to publicize the strange case of KIC 8462852.

What has been found, exactly? The Kepler telescope looks for planets by seeking tiny dips in the light of stars. Such dips are often caused by distant, unknown planets transiting – or passing in front of – their stars. But the signal from KIC 8462852 is strange. The dimming events observed from this star were very strong. It appears that anywhere from a fraction-of-a-percent to around 20 percent of the star’s light is sometimes blocked. The astronomers thus rule out a planet – even a huge planet – crossing in front of the star as the cause. The scale is just too large for that. Ross Andersen wrote at TheAtlantic.com:

 The light pattern suggests there is a big mess of matter circling the star, in tight formation. That would be expected if the star were young …But this unusual star isn’t young. If it were young, it would be surrounded by dust that would give off extra infrared light. There doesn’t seem to be an excess of infrared light around this star.

 It appears to be mature.

So the uproar over a possible megastructure surrounding KIC 8462852 stems from just a dip in the star’s light, observed by the Kepler telescope. It is a very intriguing dip.

Could it be instrument error? The astronomers now say no, it could not. Something strange is going on here.

Why would astronomers link KIC 8462852 with alien civilizations? Astronomers don’t like to assign exotic explanations for processes that nearly always turn out to be natural and ordinary. In theSeptember 11 paper about the star, Boyajian and her colleagues explored some scenarios that might explain the pattern naturally, for example, an impact on a planetary scale, like the one that created our moon. They did not say “megastructure.”

But, later, another astronomer did say it. That astronomer was Jason Wright of Penn State University, who was quoted in the article at TheAtlantic.com as saying:

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

Wright said he will be publishing an alternative interpretation of the light pattern, suggesting that it is consistent with a “swarm of megastructures,” perhaps light collectors aimed at the star itself, designed to capture the energy of KIC 8462852. This is clearly something our own civilization can’t do yet, although I’ve heard people say we are only a few hundred years from taking the first steps toward it.

What other explanations might there be? Let me emphasize again that astronomers, as a rule, do not like to go out on a limb and rarely prefer exotic explanations over simple ones. And indeed there are explanations unconnected with alien civilizations that could work to explain KIC 8462852’s weird light pattern. The best story I saw about this was from Ethan Siegel, writing in Forbes on October 16. He wrote:

 On the one hand, it could, of course, simply be aliens. But there are plenty of astrophysical explanations that could explain these light curves:

    This could be a young star with a protoplanetary disk still around it, full of dust and debris, that blocks the light at intermittent levels depending on the orientation of the disk and the star relative to our line-of-sight.

    There could be a series of giant planets with tremendous ‘ring’ structures that prevent a significant portion of the light from reaching our eyes when they pass across their star’s disk.

    This could be a star that’s undergone a significant mass-ejection event, and when a dense portion of that gas passes between our eyes and the star, a significant fraction of the light gets blocked.

    This could be an older, but violent solar system, where planets crash together and leave large amounts of debris around their star.

    Or it could be a result of a large number of comet-like objects swarming around the star, blocking large amounts of light at regular and/or irregular intervals.

He went on to say that the last two explanations are the most likely, in part because the star does appear to have a wide, binary companion. Other stories about KIC 8462852 agree that the leading hypothesis at the moment involves a swarm of comets sent hurtling toward the star by another star. In any case, so far, KIC 8462852 lacks the characteristic infrared signatures you’d expect to see if these truly were signs of alien intelligence.

What will astronomers do next? They’ll do what they always do … think, talk to each other, perhaps re-analyze some of the existing data, and try to collect and analyze more data. As mentioned at the top of this post, they began this week to peer at KIC 8462852 with a small radio telescope, the Allen Telescope Array near San Francisco. If they find something interesting, they hope to follow up with the Very Large Array (VLA) near Socorro, New Mexico.

Will they get the answer then? Will they be able to say for sure that KIC 8462852 is emitting radio waves from an alien civilization’s network of radio stations, much like those found on Earth? Or perhaps even find an intentional signal?

Only time will tell. Stay tuned.

More about Dyson spheres, or megastructures: http://www.space.com/24276-dyson-spheres-how-advanced-alien-civilizations-would-conquer-the-galaxy-infographic.html


Thank you very much, Skeen!!! 😀 



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Video fun time!!

Calendar day; October 22, 2015

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Thursday, the 22nd of October, 2015 is the 295th day in 2015 and in the 43rd calendar week.
General Events:
International Stuttering Awareness Day
October 22, 2015 in the World
International Stuttering Awareness Day is celebrated on October 22, 2015. The day is intended to raise public awareness of the millions of people – one per cent of the world’s population – who have the speech disorder of stuttering, also known as stammering. ISAD is organised by three organizations: European League of Stuttering Associations, International Fluency Association and International Stuttering Association.
Stuttering is a speech disorder in which the flow of speech is disrupted by involuntary repetitions and prolongations of sounds, syllables, words or phrases as well as involuntary silent pauses or blocks in which the person who stutters is unable to produce sounds. The term stuttering is most commonly associated with involuntary sound repetition, but it also encompasses the abnormal hesitation or pausing before speech, referred to by people who stutter as blocks, and the prolongation of certain sounds, usually vowels and semivowels.
For many people who stutter, repetition is the primary problem. The impact of stuttering on a person’s functioning and emotional state can be severe. This may include fears of having to enunciate specific vowels or consonants, fears of being caught stuttering in social situations, self-imposed isolation, anxiety, stress, shame, being a possible target of bullying, having to use word substitution and rearrange words in a sentence to hide stuttering, or a feeling of “loss of control” during speech.
Where is the event?
National Nut Day
October 22, 2015 in the USA
National Nut Day is celebrated on October 22, 2015. A nut is a fruit composed of a hard shell and a seed, where the hard-shelled fruit does not open to release the seed. In a culinary context, a wide variety of dried seeds are often called nuts, but in a botanical context, only ones that include the indehiscent fruit are considered true nuts.
Nuts are an important source of nutrients for both humans and wildlife. Because nuts generally have a high oil content, they are a highly prized food and energy source. A large number of seeds are edible by humans and used in cooking, eaten raw, sprouted, or roasted as a snack food, or pressed for oil that is used in cookery and cosmetics.
Several epidemiological studies have revealed that people who consume nuts regularly are less likely to suffer from coronary heart disease (CHD). Nuts were first linked to protection against CHD in 1993. Since then many clinical trials have found that consumption of various nuts such as almonds and walnuts can lower serum LDL cholesterol concentrations.
Where is National Nut Day?
Nationwide USA
Historical Events on 22nd October:
362 – The temple of Apollo at Daphne, outside of Antioch, is destroyed in a mysterious fire
794 – Emperor Kanmu relocates Japanese capital to Heiankyo (now Kyoto)
1383 – The 1383-1385 Crisis in Portugal: A period of civil war and disorder began when King Fernando died without a male heir to the Portuguese throne
1633 – Ming dynasty fight with Dutch East India Company that Battle of southern Fujian sea (1633), Ming dynasty won great victory
1721 – Tsar Peter the Great becomes “All-Russian Imperator”
1877 – The Blantyre mining disaster in Scotland kills 207 miners. Those widows and orphans who were unable to support themselves were evicted by the mine owners and likely sent to the Poor House
1884 – The International Meridian Conference in Washington, D.C., USA adopts Greenwich Mean Time (GMT) worldwide, creating 24 international time zones with longitude zero at the Greenwich meridian
1897 – World’s first car dealer opens in London
1926 – J. Gordon Whitehead sucker punches magician Harry Houdini in the stomach in Montreal
1953 – Laos gains full independence from France
1961 – 75,000 Flemings demand equal rights & Flemish language in Belgium
1962 – JFK imposes naval blockade on Cuba, beginning missile crisis
1964 – EMI rejects audition by “High Numbers”; they go on to become The Who
1976 – Red Dye No. 4 is banned by the US Food and Drug Administration after it is discovered that it causes tumors in the bladders of dogs. The dye is still used in Canada
1981 – The founding congress of the Nepal Workers and Peasants Organisation faction led by Hareram Sharma and D.P. Singh begins
1983 – Two correctional officers are killed by inmates in Marion, Illinois. The incident inspired the Supermax model of prisons
1997 – Compaq testifies Microsoft threaten to break Windows 95 agreement if they showcased a Netscape icon

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