JUL 19, 2016 10:30 AM PDT

Do Stars Change Colors When They Devour Planets?

WRITTEN BY: Anthony Bouchard

Stars all around the universe appear in different colors. The hottest of the hot are white, followed by blue, and somewhere near the bottom of the color spectrum are red and brown, which are some of the coldest stars out there.
 
But for the first time, researchers now suggest that a star’s color can also be impacted by the planets they devour. The research appears in a paper shared on arXiv.org.
 

Do stars change color when they devour planets?

 
As stars grow, or planets hurdle to their demise through gravitational pull, stars have been known to ‘eat’ planets. The planet’s materials typically can’t withstand the immense heat generated by a star’s nuclear fusion, and rather than surviving, they will melt.
 
But what happens when iron-rich planets are melted down to the core after being devoured by a star?
 
Researchers Emanuel Tognelli and Pier Giorgio Prada Moroni of the University of Pisa, Italy have suggested that stars devouring planets made up of certain elements may actually change color, even if temporarily.
 
As explained in the study, which involved the use of computer models the predict what would happen when stars devoured planets as large as Earth, or up to 50 times larger, it was found that stars feeding on iron-rich planets would turn redder, as the iron composition would actually change the chemical composition of the star quite drastically.
 
The study explains that the metals absorb light in the blue wavelength, and this makes it so the remaining visible light wavelengths are mostly the opposite: red.
 
Of course, the size and age of the star also has a lot to do with the effect, mostly because larger stars would only really have a dramatic impact if the planet colliding with it were larger as well, and because younger stars have so much hydrogen that a little more iron isn’t going to really do as much as, say, in a star that already has a ton of iron and is on its last legs.
 
Unfortunately, a computer model is all the team had to go by. There really isn’t any way for scientists to look out into space and push a planet into a star to find out more. These kinds of things happen to much by chance, and so observing it in real life is a problem.
 
Source: New Scientist

About the Author
  • Fascinated by scientific discoveries and media, Anthony found his way here at LabRoots, where he would be able to dabble in the two. Anthony is a technology junkie that has vast experience in computer systems and automobile mechanics, as opposite as those sound.
You May Also Like
OCT 15, 2019
Space & Astronomy
OCT 15, 2019
SpaceX Will Need to Demonstrate a Dragon Capsule Abort for NASA
NASA’s Commercial Crew initiative enabled third-party contractors such as Boeing and SpaceX to develop platforms that may be used in future crewed mi...
OCT 22, 2019
Space & Astronomy
OCT 22, 2019
Here's What We Know So Far About Titan's Liquid Methane Oceans
Titan is perhaps one of the most captivating moons orbiting Saturn today; so much so that astronomers spent a lot of time studying it when the Cassini miss...
OCT 27, 2019
Space & Astronomy
OCT 27, 2019
Mars 2020 Rover Carries Full Weight on Wheels for First Time
NASA has been working on an advanced successor to the Martian Curiosity rover for quite some time. Dubbed the Mars 2020 rover, the upgraded SUV-sized auton...
NOV 11, 2019
Space & Astronomy
NOV 11, 2019
SpaceX Puts Another 60 Starlink Satellites Into Orbit
A SpaceX Falcon 9 rocket that stood tall and proud at the launch pad at Florida’s Cape Canaveral Air Force Station ignited its engines and lofted a g...
NOV 18, 2019
Space & Astronomy
NOV 18, 2019
Say Hello to the Largest Star Ever Discovered
There are so many stars in the modern universe that we couldn’t ever hope to count them all. Many are so distant from us that we can’t even see...
FEB 11, 2020
Space & Astronomy
FEB 11, 2020
Why China Was Banned from the International Space Station
The International Space Station is just that – a place where international space agencies can work together in an effort to accomplish similar goals:...
Loading Comments...