Similar discoveries Planet Earth

Caption: Tau Ceti Star Size Comparison with the Sun

The sun is on the left.

A number of astronomers from the University of Hertfordshire, led by Mikko Tuomy managed to find a planet that may have Earth-like conditions, which also means there may be life on the planet (exoplanet).

The findings were obtained after Mikko and the members of the research team conducted more than 6,000 times the observations towards the star Tau Ceti. By using the analysis method called the Bayesian Analysis Methods, they came to the conclusion that the star Tau Ceti has five planets orbiting the star at a distance closer than the distance of the Sun to the orbit of Mars.

Selection of Tau Ceti star as the team's observations focus of the project Ozma started in 1960 that aims to seek the possibility of life beyond Earth. Tau Ceti star when it was chosen because it has the power beam that is similar to the power of the sun rays.

Star Tau Ceti is the nearest star to the Sun diurutan twentieth, a distance of approximately 11.9 light years from the Sun. Tau Ceti star belonging to the class of G, with a mass of 0.78 solar masses, and approximately half the luminosity of the Sun. The estimated age of a billion years older than the Sun. And the condition is very stable, more stable than the Sun.

Based on research Mikko and his friends, obtained the following data:

Planet	Radius Orbit	Periode Orbit	Massa dibanding Bumi
Tc b	0,105	14 hari	2,0 kali
Tc c	0,195	35 hari	3,1 kali
Tc d	0,374	94 hari	3,6 kali
Tc e	0,552	168 hari	4,3 kali
Tc f	1,35	642 hari	6,6 kali

The fifth planet has an orbit nearly perfect circle around the star Tau Ceti. In addition to differ in terms of size star and planet, Tau Ceti is not expected to have the metal element at all so it can be concluded that the planets that surround it is not expected to contain coral. It may even be a water planet.

Tau Ceti star has a brightness level rays of the sun is only 55%, so the chances of proficiency level among the five planets, planets that may contain life was closer to Tau Ceti than the distance of Earth to the Sun.

Orbital distance and Tc Tc b c too close to the star Tau pimp and planetary orbital distance d Tc roughly comparable to mid-range orbits of Venus and Mercury to the Sun. So it is unlikely to be found living there.

The ideal distance according to the brightness of Tau Ceti is the e Tc distance to Tau Ceti. Within the possible presence of water, although it may be a little colder than the Earth's water.

Meanwhile berhabitat Planet Laboratory investigations in Puerto Rico added a note that the possibility of planet Tc Tc e and f have given life on both layers of the planet's atmosphere is not expected to be too thick to allow both the planet warmer than it should be. With the warmth of the water allows the element will not freeze so it could be a life-support. And where there is water (H2O), then chances are there are also oxygen (O2).