Tuesday, February 12, 2013

Potentially Habitable Planets

Researchers from Pennsylvania State University (USA) examines the habitable zone in space for Earth-type planets. Using research related to water and carbon dioxide molecules, the researchers concluded that the planet could still potentially habitable planet when it was far from the sun.

This research is important for planning future projects to find extrasolar planets. But it seems that researchers are still constrained on technology, the author's work, as well as criticism of the study.

One of the points driving to the search for planets outside the solar system is dependent on what researchers have discovered at this time. Total foreign planet, which is called the new world has been growing rapidly.

Nearly 700 objects identified as exoplanets around stars. More than 2,000 candidates found by Kepler space telescope.

The position of the planet called habitable zone, a selection criteria. The zone is a region of space around a star, where the mass of the Earth and the planets of similar composition atmosphere (nitrogen, water, carbon dioxide) can raise liquid water on its surface.

Scientists say there is no liquid water on the surface of the Earth's two nearest planets, namely Venus and Mars. Not only the temperature of the star, but also the composition and properties of the atmosphere affects the habitable zone boundaries.

This study also used data from the distance between the Earth to the Sun, which is 1.5 million kilometers. The team of researchers from Pennsylvania State University, NASA, Washington University and the University of Bordeaux dubious previous research models in 1993.

The previous model predicts that border the habitable zone of the Sun internal and external, are between 0.95 and 1.67 astronomical units. Researchers now want to update these inaccuracies, using the absorption of solar radiation.

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