That ‘alien megastructure’ orbiting a distant star is probably just a bunch of comets
If you were still holding out hope for aliens hanging out around KIC 8462852, I’ve got some bad news for you. Researchers at Iowa State University think they’ve found an explanation for the star’s weird behavior. Spoiler alert: It’s not aliens.
In October, scientists spotted a distant star that was blinking in an unusual fashion. Unlike most of the stars spotted by the Kepler telescope — which keeps an eye on fluctuations in light to help detect planets passing in front of distant suns — this one was dimming irregularly.
Experts pointed out that the star’s light was winking in and out of view in a way that could presumably possibly be the result of some massive orbiting alien structure. The scientists didn’t really think that our space telescopes had caught sight of an “alien megastructure,” but there’s no harm in hoping.
Since then, the Search for Extraterrestrial Intelligence (SETI) institute has turned its radio telescopes to the strange star — and they haven’t heard any of the radio signals we’d expect from the goings-on of an intelligent civilization.
A cluster of comets had been floated as one possible explanation. Now, in a study published in the Astrophysical Journal Letters, Massimo Marengo of Iowa State University (along with his doctoral student Alan Hulsebus and former student Sarah Willis, now a researcher at the Massachusetts Institute of Technology’s Lincoln Laboratory) suggests it’s the most likely one.
Marengo and Co.’s work didn’t actually rule out an alien megastructure, but it did rule out other, more likely explanations — like massive planetary or asteroid collisions. Looking at the star in infrared light didn’t reveal the hot dust one would expect from such violent activity. That makes the most likely (non-alien) explanation a set of cold comets — ones that have been orbiting the planet for a while, causing different levels of dimming based on their assorted sizes and transit periods.
“This is a very strange star,” Marengo said in a statement. “It reminds me of when we first discovered pulsars. They were emitting odd signals nobody had ever seen before, and the first one discovered was named LGM-1 after ‘Little Green Men.'”
Pulsars turned out to be very weird — but they weren’t aliens, either.
“We may not know yet what’s going on around this star,” Marengo said. “But that’s what makes it so interesting.”
The invincible tardigrade — already a weird animal — is full of DNA stolen from bacteria
Apparently Earth is sprouting dark matter ‘hairs’
Someone finally looked into the physics of chocolate fountains
Scientists still can’t settle on what killed the dinosaurs
Mars might get rings just like Saturn’s one day
This article was written by Rachel Feltman from The Washington Post and was legally licensed through the NewsCred publisher network.
Roots In The Military. Relevant To All.
American Military University (AMU) is proud to be the #1 provider of higher education to the U.S. military, based on FY 2018 DoD tuition assistance data, as reported by Military Times, 2019. At AMU, you’ll find instructors who are former leaders in the military, national security, and the public sector who bring their field-tested skills and strategies into the online classroom. And we work to keep our curriculum and content relevant to help you stay ahead of industry trends. Join the 64,000 U.S. military men and women earning degrees at American Military University.