Language Selection

English French German Italian Portuguese Spanish

Planet with three suns challenges astronomers

Filed under
Sci/Tech

In a scenario out of "Star Wars," astronomers have detected a planet outside our solar system with not one, but three suns, a finding that challenges astronomers' theories of planetary formation.

The planet, a gas giant slightly larger than Jupiter, orbits the main star of a triple-star system known as HD 188753 in the constellation Cygnus ("The Swan").

The stellar trio and its planet are about 149 light-years from Earth and about as close to each other as our sun is to Saturn, U.S. scientists reported Thursday in the current edition of the journal Nature.

A light-year is about 6 trillion miles, the distance light travels in a year.

If you stood on the planet's surface, you would see three suns in sky, although its orbit centers around the main yellow star among the trio. The larger of the other two suns would be orange and the smaller would be red, astronomers at California Institute of Technology said in a statement.

An artists' rendering of the planet and three stars, as seen from a hypothetical moon, is available at here.

The new finding could upset existing theories that planets usually form out of gas and dust circling a single star, and could lead scientists to look in new places for planets.

"The implication is that there are more planets out there than we thought," the commentary said.

Caltech astronomer Maciej Konacki, who wrote the research article, refers to the new type of planets as "Tatooine planets," because of the similarity to Luke Skywalker's view of his home planet by the same name, with its multiple suns, in the original "Star Wars" film.

The fact that a planet can even exist in a multiple-star system is amazing in itself, according to Konacki. Binary and multiple stars are quite common in the solar neighborhood, and in fact outnumber single stars by some 20 percent.

But so far, most extrasolar planets -- those discovered outside our planetary system -- have been detected by watching for a characteristic wobble in the stars their orbit, reflecting the gravitation pull the planets exert on their suns.

This method is less effective for binary and multiple star systems, and existing theories said planets were unlikely to form in this kind of environment.

Konacki found a new way to identify planets by measuring velocities of all bodies in a binary or multiple star system.

Source.

More in Tux Machines

Leftovers: Screenshots and Screencasts

Android Leftovers

GCC 4.9.2 vs. GCC 5 Benchmarks On An Intel Xeon Haswell

For those craving some more GCC 5 compiler benchmark numbers following last week's release of GCC 5.1, here's some new comparison numbers between GCC 4.9.2 stable and the near-final release candidate of GCC 5.1. Pardon for this light article due to still finishing up work on migrating to the new Phoronix web server while separately working to take care of thermal issues coming about in the new Linux benchmarking server room. Read more

First impressions of Ubuntu 15.04

Canonical's Ubuntu operating system is probably the most widely used Linux distribution in the world. Ubuntu is made available in several editions, including desktop builds, server builds and there is a branch of Ubuntu for mobile phones. Ubuntu provides installation images for the x86, ARM and Power PC architectures, allowing the distribution to run on a wide variety of hardware. The most recent release of Ubuntu, version 15.04, includes a fairly short list of changes compared to last year's Ubuntu 14.10, however some of the changes are significant. Some small changes include an upgrade of the kernel to Linux 3.19 and placing application menus inside the application window by default. A potentially larger change is the switch from Canonical's Upstart init software to systemd. Read more