reionization
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Reionization — in the universe. The universe is currently ionized, in this sense.The first phase change was , which occurred at a redshift z = 1100 (400,000 years after the Big Bang), due to the cooling of the universe to the point where the rate of combination … Wikipedia
Wilkinson Microwave Anisotropy Probe — WMAP redirects here. WMAP may also refer to either radio station WXNC or WGSP FM. Wilkinson Microwave Anisotropy Probe General information NSSDC ID 2001 027A … Wikipedia
Timeline of the Big Bang — Physical cosmology Universe · Big Bang … Wikipedia
Gunn-Peterson trough — In astronomical spectroscopy, the Gunn Peterson trough is a feature of the spectra of quasars due to the presence of neutral hydrogen in the Intergalactic Medium (IGM). The trough is characterized by suppression of electromagnetic emission from… … Wikipedia
Reionisierungsepoche — Logarithmische Zeitlinie des Universumes, die die Reionisierungsepoche im Vergleich der Geschichte des Universums darstellt In der Urknallkosmologie entspricht die Reionisierungsepoche dem Zeitraum, in dem sich die Materie des Universums wieder… … Deutsch Wikipedia
Hydrogen line — For hydrogen lines in general, see Hydrogen spectral series. The hydrogen line, 21 centimeter line or HI line refers to the electromagnetic radiation spectral line that is created by a change in the energy state of neutral hydrogen atoms. This… … Wikipedia
Lambda-CDM model — Physical cosmology Universe · Big Bang … Wikipedia
Big Bang — This article is about the cosmological model. For the sitcom, see The Big Bang Theory. For other uses, see Big Bang (disambiguation) … Wikipedia
Cosmic microwave background radiation — CMB and Cosmic background radiation redirect here. For other uses see CMB (disambiguation) and Cosmic background (disambiguation). Physical cosmology … Wikipedia
Donald C. Backer — (November 9, 1943 – July 25, 2010) was an American astrophysicist who primarily worked in radio astronomy. Backer made important contributions to the understanding and study of pulsars, including the discovery of the first millisecond pulsar,… … Wikipedia
