Cosmology

Definition

Cosmology is the study of the universe; its birth, evolution, and ultimate fate. This includes further developing and refining the prevailing model, the Big Bang theory, investigating the universe’s rate of expansion, and measuring radiation left over from the Big Bang, the so-called cosmic microwave background.

Latest Research and Reviews

  • Research |

    Four galaxies discovered near quasars at redshifts exceeding 6 have star-formation rates that are high enough to explain the massive elliptical galaxies known to exist at redshifts of about 4.

    • R. Decarli
    • , F. Walter
    • , B. P. Venemans
    • , E. Bañados
    • , F. Bertoldi
    • , C. Carilli
    • , X. Fan
    • , E. P. Farina
    • , C. Mazzucchelli
    • , D. Riechers
    • , H.-W. Rix
    • , M. A. Strauss
    • , R. Wang
    •  & Y. Yang
    Nature 545, 457–461
  • Research |

    A faint galaxy has been detected in the very early Universe thanks to deep observations and a massive cluster gravitationally magnifying its emission. One out of only five such galaxies known, this detection constrains how the Universe was reionized.

    • Austin Hoag
    • , Maruša Bradacˇ
    • , Michele Trenti
    • , Tommaso Treu
    • , Kasper B. Schmidt
    • , Kuang-Han Huang
    • , Brian C. Lemaux
    • , Julie He
    • , Stephanie R. Bernard
    • , Louis E. Abramson
    • , Charlotte A. Mason
    • , Takahiro Morishita
    • , Laura Pentericci
    •  & Tim Schrabback
  • Research |

    A massive ancient galaxy with minimal star formation is observed spectroscopically at an epoch when the Universe is less than 2 billion years old, posing a challenge to theories.

    • Karl Glazebrook
    • , Corentin Schreiber
    • , Ivo Labbé
    • , Themiya Nanayakkara
    • , Glenn G. Kacprzak
    • , Pascal A. Oesch
    • , Casey Papovich
    • , Lee R Spitler
    • , Caroline M. S. Straatman
    • , Kim-Vy H. Tran
    •  & Tiantian Yuan
    Nature 544, 71–74
  • Research | | open

    The cosmic optical background is an important cosmological observable. Here the authors show that a direct observation of the background brightness from the outer solar system can be obtained by the LORRI instrument aboard the New Horizons mission, on the basis of data acquired between Jupiter and Uranus.

    • Michael Zemcov
    • , Poppy Immel
    • , Chi Nguyen
    • , Asantha Cooray
    • , Carey M. Lisse
    •  & Andrew R. Poppe
  • Research |

    The rotation velocities in the outer disks of six massive star-forming galaxies are shown to decrease with disk radius, owing to high baryonic mass fractions and large velocity dispersions.

    • R. Genzel
    • , N. M. Förster Schreiber
    • , H. Übler
    • , P. Lang
    • , T. Naab
    • , R. Bender
    • , L. J. Tacconi
    • , E. Wisnioski
    • , S. Wuyts
    • , T. Alexander
    • , A. Beifiori
    • , S. Belli
    • , G. Brammer
    • , A. Burkert
    • , C. M. Carollo
    • , J. Chan
    • , R. Davies
    • , M. Fossati
    • , A. Galametz
    • , S. Genel
    • , O. Gerhard
    • , D. Lutz
    • , J. T. Mendel
    • , I. Momcheva
    • , E. J. Nelson
    • , A. Renzini
    • , R. Saglia
    • , A. Sternberg
    • , S. Tacchella
    • , K. Tadaki
    •  & D. Wilman
    Nature 543, 397–401

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