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When one imagine the evolution of life on another planet, the scientist have to make a lot of speculations. Our observation methods can't (today (2005) they claim they have -ré.remark) Nevertheless, the numerical simulations on computer have shown that we should find numerous planets in our galaxy, with small dense planet, like Venus, the Earth, Mars, made of heavy materials, and some big planets outside of the solar system, made of light materials2;. If a planet is located to the right distance from its sun so that water is not in a solid state (MARS) of gaseous state (Venus), the The scientists give the same value as the Ummits concerning the possible number of systems housing an organised life in our galaxy: one million. Same number as in the Ummit texts of 1967. The Ummits indicate what could be the fork concerning the planetary parameters which allow, not the appearing of life, but the emergence of humans from a primitive life: Surface temperaureof the star : between 4552 and 6160 ° K Exentricity of the planetary orbit: between zero and 0,1766 Day length: de 16h 30a 84h Superficial planetary temperature:from 32°C to 46° C Planet mass: from 2,65 1027 g to 1,2 1028 g 2< In the atmosphere near the ground: 18 % oxygéne minimum 65 % nitrogen minimum. Intensity of cosmic rays: under 0,48 nucleons /cm2/s As the Ummit sun would be colder, the planet would have a smaller orbit and the Ummit year would be shorter: about 2.54 terrestrial months. Earth. Because of the lack of any natural barriers, there would be on Ummo only one ethnic groups and only one language. Apparently, 104 have attenuated the mutation effects2: of the solar rays. All that seems effectivelly quite coherent. detect any planet other outside of our solar system. live may appear and evolve there. Let's come back to the text which evokes the first contact with the