Universe

Planet with three sunsets a day

For the first time, astronomers have discovered a planet orbiting three Sun. It was previously considered impossible, to unstable the whole. But HD brings finished the feat 131399A. Since 16 million years. And there are a few other bizarre discoveries.

For romantics, the ideal may be HD 131399 AB with the partner of choice to look at a beautiful and spectacular sunset. Because this now by astronomers at the very large telescope (VLT) of the European Southern Observatory (ESO) in the Attacama desert in Chile discovered exo-solar planet orbiting a not only one but three suns.

This chart shows the location of the triple star HD 131399 in the large southern constellation of Centaurus (The Centaur). This star, whose brightest component is orbited by the unique planet HD 131399Ab, is too faint to be seen with the unaided eye, but can be found in binoculars. Its location is marked on this chart with a red circle.
This chart shows the location of the triple star HD 131399 in the large southern constellation of Centaurus (The Centaur). This star, whose brightest component is orbited by the unique planet HD 131399Ab, is too faint to be seen with the unaided eye, but can be found in binoculars. Its location is marked on this chart with a red circle.

And this is new and makes something very special in the Cosmos HD 13199Ab: because so far the astrophysicist had always assumed that orbit around three Suns was so unstable, that the planet from the system will be ejected.

“This kind of orbit can be very stable”

“If the planet from the Earth’s richest star in the system would be farther away, he would be pushed out of the system”, explains Daniel Apai from the University of Arizona and one of the co-authors of the subject article to the discovery of the strange planet, is now published in the online edition of the journal Science. “Our computer simulations have shown that this type of orbit can be very stable. If it changes only a little, she may become rapidly unstable.”

HD 131399Ab can be a lot of time for his trip to the three suns. “For about half of the orbit of the planet, the 550 years of the Earth takes, three stars in the sky are visible, the light of the weaker two are always close and change their apparent separation during the year,” added Kevin Wagner, first author of the subject article and discoverer of the illustrious exo-planets.

Planet with three suns
This artist’s impression shows a view of the triple star system HD 131399 from close to the giant planet orbiting in the system. The planet is known as HD 131399Ab and appears at the lower-left of the picture. Located about 320 light-years from Earth in the constellation of Centaurus (The Centaur), HD 131399Ab is about 16 million years old, making it also one of the youngest exoplanets discovered to date, and one of very few directly-imaged planets. With a temperature of around 580 degrees Celsius and having an estimated mass of four Jupiter masses, it is also one of the coldest and least massive directly-imaged exoplanets.

So, it is a cosmic dance, taking place there: the brightest star to be 80 percent more massive than our Sun and HD is called 131399A. The two less massive stars B and C orbiting star A at a distance of about 300 astronomical units. Of which one corresponds to the average distance of the Earth to the Sun. At the same time the B and C each other like a spinning dumbbell at a distance, which roughly corresponds to the Sun and Saturn orbit.

Unusual circumstances in the constellation Centaurus

HD 131399Ab is the first extra-solar planet discovered the SPHERE instrument at the VLT. The sensitivity of SPHERE in the infrared range made it possible to demonstrate the characteristic properties of young planets in this wavelength range. HD 131399Ab is one of the youngest exo-planet discovered to date and one of the few that could be mapped directly.

Read More: http://www.eso.org/public/news/eso1624/