Astronomers create 2 indexes to rank habitable alien worlds

2.    Planetary Habitability Index: The PHI is "based on the presence of a stable substrate, available energy, appropriate chemistry, and the potential for holding a liquid solvent. The PHI has been designed to minimize the biased search for life as we know it and to take into account life that might exist pursuant to this agreement more exotic conditions."The authors thought that such a classification system is necessary because, as they state, "In the then few years, the number of catalogued exoplanets will be counted in the thousands. This will vastly expand the number of potentially habitable worlds and lead to a systematic assessment of their astrobiological potential."They conclude, "Both indices are formulated after a fashion that enables their values to be updated as research and our knowledge about habitable planets, moons, and life advances. Applying the proposed metrics to bodies within our Solar System for comparison reveals two planets in the Gliese 581 system, GJ 581 c and d, with an ESI comparable to that of Mars and a PHI between that of Europa and Enceladus."Page two concludes with the top ten planets and moon with respect to ESI and PHI.

The TUPS Company in conjunction with the Gunnedah Shire Council today officially launched the Gunnedah Community Wi-Fi at the Gunnedah Shire Council Depot delivering fast, cost-effective internet connectivity.