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.
For religious and other non-scientific estimates, see Dating creation. In physical cosmology, the age of the universe is the time elapsed since the Big Bang. The current measurement of the age of the universe is 7001137990000000000â 13.799Â±0.021 billion (109) years within the Lambda-CDM concordance model.