Integrated essay for the TOEFL. My attempt. Nebular hypothesis In the reading passage we have learnt about nebular hypothesis. It suggests that 4-5 million years ago the giant cloud of dust and gas, which is called nebular, started it’s rotation due to gravitational forces. Even though 99 percents of this cloud mass was helium and hydrogen, huge variety of other elements were presented there. Later this revolving cloud became the Sun and planets. In other words, the planetary solar system where we live now was formed. Moreover, from the reading passage we know, that the process of Sun formation out of revolving cloud is called collapse. when Sun was evolved out of the revolving Further information about this process is given in a lecture. Referring to the nebular hypothesis during the lecture, professor introduced to us recent experiments in science that were done with using new computers. According to the lecturer, the main target of this research was to make a model of a collapse. The goal of this research was to verify how theory of solar system formation corresponds with computational modeling. The results inferred that the stars and planet formation from cloud, which consists of gas and dust, is natural process. Even more, it is rather the rule that planet could be formed as a result of this process. Professor concluded that now scientists want to use computations to examine the possibility of existence such planet that supports life.