The cosmic time in terms of the redshift

Moshe Carmeli, John G. Hartnett, Firmin J. Oliveira

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


In cosmology one labels the time t since the Big Bang in terms of the redshift of light emitted at t, as we see it now. In this Note we derive a formula that relates t to z which is valid for all redshifts. One can go back in time as far as one wishes, but not to the Big Bang at which the redshift tends to infinity.

Original languageEnglish
Pages (from-to)277-283
Number of pages7
JournalFoundations of Physics Letters
Issue number3
StatePublished - 1 Jun 2006


  • Cosmic time
  • Redshift

ASJC Scopus subject areas

  • General Physics and Astronomy


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