Astronom Peru, Jorge Melendez of the Australian National University, and Ivan Ramirez of the University of Texas at Austin, U.S., have found "Marton sun" is the best at this time. The discovery was achieved using the 2.7-meter telescope Harlan J. Smith at the McDonald Observatory. The discovery of their chemical composition shows that the Sun is not seunik as computed earlier.

These stars, hip 56,948, more similar to the Sun than any ever known. Located as far as 200 years light in the constellation Draco, the star around semiliar years younger than the Sun.

Previously, only three Marton has been known that the sun, each was 18 Scorpii, HD 98618, and HIP 100963. However, although in some cases have a similarity with the sun, the stars have a fundamental difference in the content lithiumnya that far exceed the content of Lithium in the Sun. Lithium content of the very few in the sun was making the astronom that the sun is a star that is very unique among other stars.

Marton latest discovery of the sun to break this assumption is. HIP 56948 are known to have the same Lithium content with the low sun. This study also reveal other Freuchie from the Sun, hip 73,815, which also contains the same Lithium low.

Questions about the uniqueness of the sun associated with what is known as the "principle antropik" (anthropic principles), which questioned about whether there was something special on the Sun that allows organisms living in our solar system. This discovery does not fully answer these questions, but it only shows that uniqueness is clearly not located on the composition of chemistry.

Melendez and Ramirez findings support this principle of reverse antropik, who called the views "Copernician", that is possible existence of living organisms can be found anywhere in the universe. Both suggest that stars like HIP 56948 can be a good target for the program researcher at the SETI (Search for Extra-Terresterial Intelligence).

Star has learned by Planet Search Program at the McDonald Observatory, led by astronom Bill Cochran of the University of Texas. Cochran and their team found that, like our Sun, hip 56,948 from the planet does not have a class "hot Jupiter" - the planet bermassa large, have a short orbital period, and explore its mother star in the very near distance. This kind of planet is known to the public. Up to now, have been found more than 200 stars that have one or more hot Jupiter-class planet that mengorbit.

Search "Marton sun" This is important, because the sun astronom use as a benchmark in various studies. However, they can not learn about the Sun in the same way as they learn that a star far, because the distance is unduly close, and penampakannya that is too bright.

Marton sun, which is found in McDonald will be very useful in various fields in astrofisika. Among them, these stars can help astronom learn that the chemical composition of stars, as well validate the theoretical model of the interior and evolution of stars. Selengkapnya...