which unexpected chemicals are found in the other type of cloud you mentioned just now?
Formaldehyde, methanol, and vinyl alcohol.
Interstellar cloud
formaldehyde, methanol, and vinyl alcohol. 
what is the estimate time of the formation and evolution of the solar system? It began 4.5 billion years ago is there any proof or model which justifies its formation? Yes, it's called the nebular hypothesis who gave this hypothesis? Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace what was stated in it, can you give at least one point? It says that the Solar System formed from the gravitational collapse of a fragment of a giant molecular cloud. what do you mean by this last term of cloud? It is a type of interstellar cloud, the density and size of which permit the formation of molecules,
wiki:7757765
Interstellar cloud [SEP] Unexpected chemicals detected in interstellar clouds
Until recently the rates of reactions in interstellar clouds were expected to be very slow, with minimal products being produced due to the low temperature and density of the clouds. However, organic molecules were observed in the spectra that scientists would not have expected to find under these conditions, such as formaldehyde, methanol, and vinyl alcohol. The reactions needed to create such substances are familiar to scientists only at the much higher temperatures and pressures of earth and earth-based laboratories. The fact that they were found indicates that these chemical reactions in interstellar clouds take place faster than suspected, likely in gas-phase reactions unfamiliar to organic chemistry as observed on earth.