Rachele Toniolo (Page 2)

The Earth is the only planet of the Solar System which hosta life.  What does it make such a special planet? There are several features which make our planet suitable to life, but there are two main ones. First of all, it lies in the so-called habitable zone, the region around a star (indicated in green in the imagine aside) where it is theoretically possible for a planet to maintain clear water on its surface. The planets beyond the habitable zone have too low a temperature, therefore water – it present – isLEGGI TUTTO

Mars is the fourth planet of the Solar System in order of distance from the Sun, and the last of the earthly planets, after Mercury, Venus and the Earth. It was also called the red Planet because of its characteristic colour, caused by the huge quantity of  oiron oxide which covers it. Upon its surface, we can see mountains, valleys, canyons, deserts and volcanoes. Its atmosphere is rarefied, its pressure is very low (1/10 of the terrestrial one). The temperature goes from -140 °C to 20 °C: it is not so bad! On the poles,LEGGI TUTTO

In order to go looking for intelligent life forms in the Universe, astronomers have developped a scientific programme called SETI (Search for Extra-Terrestrial Intelligence). According to the prerequisites of the programme, if there was such an evolved civilization capable of communicating, probably it would send radio signals, just like we do on the Earth with our mobile phones. Starting from this concept, SETI researchers use radiotelescopes in order to look for artificial extra-terrestrial (ET) signals. A radiotelescope is a telescope which, unlike the classical ones, which observes the invisible, is specializedLEGGI TUTTO

In order to estimate the number of extraterrestrial civilizations capable of communicating within our Galaxy –  the Milky Way – the astronomers use a mathematical formula called Drake equation e. The name comes from Frank Drake, the US astronomer and astrophysicist who first issued it. In the game we are proposing – realized with Scratch – you can estimate the number of intelligent civilizations in our Galaxy by using a simplified version of this formula. The original formula contains seven terms, whereas here we only have three terms: A: number ofLEGGI TUTTO