• Entry
  • Reader's guide
  • Entries A-Z
  • Subject index

Cosmic time is a measure of time on a scale of billions of years, during which the universe is cooling and expanding from its initial hot, dense state, and stars and galaxies are evolving. The universe had its beginning about 14 ...

    • Loading...
    locked icon

    Sign in to access this content

    Get a 30 day FREE TRIAL

    • Watch videos from a variety of sources bringing classroom topics to life
    • Read modern, diverse business cases
    • Explore hundreds of books and reference titles