Spitzer telescope vehicle outer Tata Surya to find the system with four main stars in the constellation TW Hydrae, a distance of approximately 150 light years. The two pairs of stars orbit each other gandanya one against the other vessel pair ballet dancers.

Author: Ninok Leksono / Space

In addition to interest objects very far away sky, associated with the field of cosmology, the astronom seems to have continued attention of the Tata Surya system - where the planet-planet Earth evolved including girth Sun. Tata Surya who has now aged about five billion years appears to save the many mysteries that still need to explore.

Therefore unmanned mission was sent to continue to get information about new and keplanetan components Tata Surya other. Among other things, this is realized with the delivery New Horizon mission to Pluto Planet in January 2006.

While investigations continue to be done to the planet-planet in Tata Surya, the new findings also appear in the continued investigation of the planet outside of Surya, or better known as eksoplanet. One of the planet - Gliese 581 - is called the Super Earth (size large), because its parameters showed different planet reasonable habitation.

Many sun
In his writings in Kompas (December 8, 2006) alumnus Taufiq nudge astronomy solar system with more than one sun. One example is the solar system with three-stars as the star HD188753 in the constellation is in the Angsa (Cygnus). In the system that is 149 light years (1 light year = 9500 billion km), the main stars in the two stars kitari by other smaller size. Beyond that there is a gas planet larger than Jupiter mengorbit closer to the parent star orbit with period 3.5 days.

On the other system, there is also a planet that is found on the stars ganda. For example, the star Gamma Cephei ganda. Bermassa main stars of mass 1.6 Sun has a planet with a mass 1.76 times Jupiter mengorbit the far distance Sun-Mars (1.5 AU (Astronomical Unit) 1 AU = 150 million km), and stars have a partner that is sized in the far distance a small sun-Uranus (19.2 AU).

This vehicle has not been long outer Spitzer telescope to find the system that has four main stars appear as illustrated in this paper support.

Spitzer has the equipment inframerahnya directed to examine the disk of dust that encircle the four star system HD 98800. Dust disk is held forth to the planet. And indeed with the disc in the system of stars astronom find this disc is not even continuous, but the rift that already imply the existence of such a planet have.
Planet behave like a cosmic vacuum cleaner. He was absorbing all the dirt that is in the path lintasannya, said Elise Furlan of Astrobiologi Institute at the University of California at Los Angeles as the site made PhysOrg.com. Furlan is the main author of the report of issuance is approved by The Astrophysical Journal.

HD 98800 was estimated to 10 million years, and is in the constellation TW Hydrae a distance of 150 light years. Before examined by Spitzer, astronom already have some information about the stars of this observation telescopes land. They already know that this system has four stars, four stars and that is in pairs in the system two stars (doublet, or binary).

The stars in the star system mengorbit ganda against one another, as well as two pairs of double stars orbit each other is also one of the other pair-pair as ballet dancers. One of the star pair - called HD 98800B - dust in the disc has sekelilingnnya, while one pair is not.

As reported by NASA, the four stars are bound by mutual gravitation, and the distance between the two pairs of stars is about 50 AU, or slightly more than the distance Sun - Pluto is about 40 AU. Because the technology is still terkendala, then the astronom before this can not investigate the dust disk around the star pair HD98800B with details.

Spitzer services
With the Spitzer telescope is astronom can finally see the disc with the details. By using infrared spektrometer, Furlan team can detect the existence of two belt in the dust disc made of dust grains are large. One belt is located about 5.9 AU from the stars ganda HD98800B, or the distance around the Sun - Jupiter. Belt is most likely composed of the asteroid or comet.

While others have a belt on the distance of 1.5 AU to 2.5 AU, comparable to the location of the planet Mars and the asteroid, and most likely composed of fine ear.
Generally, if there are empty spaces (gaps) in the dust disk, astronom ago bercuriga have a planet that has the track is clear. However, astronom not too sure about the planet in the HD 98800B system.

The astronom trust, that the planet-planet form over millions of years, after the small dust grains to join each other form larger objects. In some cases, rock-rock cosmic bertumbukan each other to form rocky planet like Earth, are formed in the case of other gas planet like Jupiter. Meanwhile, rock-rock that does not form a large planet and a comet asteroid.

When structures bertumbukan stone with tremendous, serpihan dust terlontar to the sky, and this is seen by the infrared eyes of Spitzer are very sensitive.
According to Furlan, the dust caused by collision objects in the belt outside berbatu akan should move to the plate in the dust. Just in case HD98800B, dust particles in the disk does not fill as expected. It may be this is caused by the planet or by the other stars who do not have a dust disk but gravitasinya affect the movement of dust particles.

Because young stars are developing into complex systems, then the astronom need to realize that the evolution of the dust disk around the young stars of the type system and the establishment of keplanetan that could have far more complex system than single stars like our Tata Surya, add Furlan.
But outside of the complexity of the process consider the birth of such a solar system, imagine living on a planet with sun bears four distinctive sensation. (*)