Early universe

The early Universe refers to the onset and first couple of billion years of the Universe. Research topics include but are not limited to the radiation leftover from the Big Bang (cosmic microwave background), the formation of the first stars, and high-redshift galaxies.

Latest Research and Reviews

  • Research |

    In the early Universe, fluctuations in the neutrino density produced a distinct shift in the temporal phase of sound waves in the primordial plasma. The size of this phase shift has now been constrained through baryon acoustic oscillation data.

    • Daniel Baumann
    • , Florian Beutler
    • , Raphael Flauger
    • , Daniel Green
    • , Anže Slosar
    • , Mariana Vargas-Magaña
    • , Benjamin Wallisch
    •  & Christophe Yèche
    Nature Physics 15, 465-469
  • Research |

    The molecular gas in the inner kiloparsec of a submillimetre-bright galaxy is clumpy and gravitationally unstable, collapsing to form stars at a rate that will deplete the gas in about 100 million years.

    • K. Tadaki
    • , D. Iono
    • , M. S. Yun
    • , I. Aretxaga
    • , B. Hatsukade
    • , D. H. Hughes
    • , S. Ikarashi
    • , T. Izumi
    • , R. Kawabe
    • , K. Kohno
    • , M. Lee
    • , Y. Matsuda
    • , K. Nakanishi
    • , T. Saito
    • , Y. Tamura
    • , J. Ueda
    • , H. Umehata
    • , G. W. Wilson
    • , T. Michiyama
    • , M. Ando
    •  & P. Kamieneski
    Nature 560, 613-616
  • Reviews |

    A review of the various techniques to obtain photometric redshifts, from template-fitting to machine learning and hybrid schemes, and a description of the latest results on extragalactic samples and how survey strategy choices impact redshift accuracy.

    • Mara Salvato
    • , Olivier Ilbert
    •  & Ben Hoyle
    Nature Astronomy 3, 212-222

News and Comment

  • News and Views |

    In 1951, three separate research groups established radio astronomy as a contender to the dominance of optical astronomy. Using the interstellar 21-cm line, they provided a method to look deeper into our own Galaxy and back in time to the birth of all galaxies.

    • Emma Chapman
    Nature Astronomy 3, 298-299
  • Research Highlights |

    In January, the Dark Energy Survey (DES) completed its 6-year-mission to map more than 300 million distant galaxies; however, the equally arduous task of analysing the data is just beginning.

    • Iulia Georgescu
  • Research Highlights |

    Two robotic missions, one from China and one from India, will explore the southern lunar hemisphere, sending back a wealth of information about the surface and composition of the Moon, and perhaps even more.

    • Iulia Georgescu