Answer: The Sun and the planets formed together, 4.6 billion years ago, from a cloud of gas and dust called the solar nebula. A shock wave from a nearby supernova explosion probably initiated the collapse of the solar nebula. The Sun formed in the center, and the planets formed in a thin disk orbiting around it.
Explanation: how were the planets in the solar system formed?
The 3rd sentence is the answer
The similarities / characteristics the two cars share
Answer: The main purpose he has for writing this is that the cloaning of humans can be done but it is also very hard to do.
Explanation: But every previous attempt ended in failure or fraud, leading many scientists to wonder if the goal might be impossible to reach.
