LA TIERRA TIENE UNA COMPOSICIÓN MUY NORMAL

La Tierra está hecha de materiales "corrientes" en los sistemas planetarios de nuestra galaxia. https://buff.ly/2vLfYF2

Study of material surrounding distant stars shows Earth's ingredients 'pretty normal' -- ScienceDaily: The Earth's building blocks seem to be built from 'pretty normal' ingredients, according to researchers working with the world's most powerful telescopes. Scientists have measured the compositions of 18 different planetary systems from up to 456 light years away and compared them to ours, and found that many elements are present in similar proportions to those found on Earth. This will have implications for finding Earth-like bodies elsewhere.