What's Causing This Star to Emit Such Unusual Light Patterns?
An update on the star 1,480 light-years away that gave us hope we weren't alone in the universe.
Our worst fears have been confirmed: The formation circling the star KIC 8462852 may merely be a swarm of comets — not the “alien megastructure” we hoped it would be.
[Editor's note: "Nooooooooo!"]
A group of researchers from Iowa State University have proposed a new most likely scenario for observations made earlier this year by NASA's Kepler and Spitzer space telescopes. They believe the strange objects, which are causing the 22 percent dimming of starlight brightness, are most likely an array of dusty comet fragments. This concurs with assertions by the “Planet Hunters” citizen scientists group.
The recent study crushes a lot of hopes of Earth having a neighbor among the stars in this lonely universe.
“The scenario in which the dimming in the KIC 8462852 light curve were caused by the destruction of a family of comets remains the preferred explanation,” they wrote. The researchers believe this explanation is the most likely, but they aren't ruling out an alien megastructure.
“We didn’t look for that,” Massimo Marengo, an Iowa State University associate professor of physics and astronomy, said in a press release. “We can’t really say it is, or is not. But what the star is doing is very strange. It’s interesting when you have phenomena like that — typically it means there’s some new physical explanation or a new concept to be discovered.”
However, after two weeks of the Allen Telescope Array pointed at the KIC 8462852 star, the Search for Extraterrestrial Intelligence Institute (SETI) reports it has yet to detect any radio signals.
“Is it some strange coincidence of having big planets nearby like Jupiter that helped deflect asteroids that allow enough time for life on this planet to have gotten to the point; are there other contingencies that we don’t know about that are so rare that maybe intelligent life happens only here? We don’t know,” says theoretical physicist Brian Greene.
Natalie has been writing professionally for about 6 years. After graduating from Ithaca College with a degree in Feature Writing, she snagged a job at PCMag.com where she had the opportunity to review all the latest consumer gadgets. Since then she has become a writer for hire, freelancing for various websites. In her spare time, you may find her riding her motorcycle, reading YA novels, hiking, or playing video games. Follow her on Twitter: @nat_schumaker
Photo Credit: STAN HONDA / Getty Staff
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It's one of the most consistent patterns in the unviverse. What causes it?
- Spinning discs are everywhere – just look at our solar system, the rings of Saturn, and all the spiral galaxies in the universe.
- Spinning discs are the result of two things: The force of gravity and a phenomenon in physics called the conservation of angular momentum.
- Gravity brings matter together; the closer the matter gets, the more it accelerates – much like an ice skater who spins faster and faster the closer their arms get to their body. Then, this spinning cloud collapses due to up and down and diagonal collisions that cancel each other out until the only motion they have in common is the spin – and voila: A flat disc.
It turns out, that tattoo ink can travel throughout your body and settle in lymph nodes.
In the slightly macabre experiment to find out where tattoo ink travels to in the body, French and German researchers recently used synchrotron X-ray fluorescence in four "inked" human cadavers — as well as one without. The results of their 2017 study? Some of the tattoo ink apparently settled in lymph nodes.
Image from the study.
As the authors explain in the study — they hail from Ludwig Maximilian University of Munich, the European Synchrotron Radiation Facility, and the German Federal Institute for Risk Assessment — it would have been unethical to test this on live animals since those creatures would not be able to give permission to be tattooed.
Because of the prevalence of tattoos these days, the researchers wanted to find out if the ink could be harmful in some way.
"The increasing prevalence of tattoos provoked safety concerns with respect to particle distribution and effects inside the human body," they write.
It works like this: Since lymph nodes filter lymph, which is the fluid that carries white blood cells throughout the body in an effort to fight infections that are encountered, that is where some of the ink particles collect.
Image by authors of the study.
Titanium dioxide appears to be the thing that travels. It's a white tattoo ink pigment that's mixed with other colors all the time to control shades.
The study's authors will keep working on this in the meantime.
“In future experiments we will also look into the pigment and heavy metal burden of other, more distant internal organs and tissues in order to track any possible bio-distribution of tattoo ink ingredients throughout the body. The outcome of these investigations not only will be helpful in the assessment of the health risks associated with tattooing but also in the judgment of other exposures such as, e.g., the entrance of TiO2 nanoparticles present in cosmetics at the site of damaged skin."
Do you have a magnetic compass in your head?
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