Alliteration: Alliteration is a special case of consonance and refers to the repetition of consonant sounds or blends at the beginning of words or in the stressed syllables of a line. Since consonance may happen anywhere in a word, the concepts are related but not identical.
How Old is the Solar System? How old is the Solar System? That is a question that cuts to the heart of it all. By studying several things, mostly meteorites, and using radioactive dating techniques, specifically looking at daughter isotopes, scientists have determined that the Solar System is 4.6 billion years old.
The naturalistic story of the solar system goes back 4.5 billion years. In this view the solar system began as a cloud of dust and gas that collapsed on itself. A star began to form as the cloud was compressed by some unknown force. As the star spun and collected more mass, a disk of dust began to form the planets.