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HomeSpaceJames Webb Telescope discovers three of the oldest galaxies in the universe

James Webb Telescope discovers three of the oldest galaxies in the universe

The discovery of three of the oldest galaxies in the universe by the James Webb Space Telescope opens a unique window into the earliest moments of the cosmos and revolutionizes our understanding of galactic evolution.

Fascination with the age of the universe

The age of the universe is a captivating subject that has fascinated scientists and philosophers for centuries. Using various methods, they were able to calculate that the universe is approximately 13.798 billion years old, with a margin of error of 37 million years. This estimate provides us with a more or less precise time scale for understanding the evolution of the cosmos.

Key milestones since the Big Bang:

  • Constant expansion and cooling of the cosmos.
  • Formation of the first stars and galaxies in the first billion years.
  • The first galaxies discovered by James Webb

    In this context of cosmic evolution, a team of researchers used the power of the James Webb Space Telescope to detect three of the first galaxies formed in the universe. These galaxies began forming when the universe was just 400 to 600 million years old, providing a valuable window into the early history of the cosmos.

    Characteristics of these primitive galaxies:

  • Surrounded by large quantities of gas composed mainly of hydrogen and helium, the most basic elements in the universe.
  • This dense gas, detected thanks to the extreme sensitivity of the Webb, is crucial for the formation of new stars.
  • Unprecedented scientific progress

    โ€œWithout the Webb, we would not be able to observe these ancient galaxies, let alone learn as much about their formation,โ€ says Kasper Heintz, lead author of the study and researcher at the Center for Cosmic Dawn (DAWN) at the University of Copenhagen.

    The achievements of the James Webb telescope:

  • Launched in December 2021, it provided never-before-seen images and data from the universe.
  • Its ability to observe in infrared wavelengths makes it possible to study previously invisible objects, such as these primordial galaxies.
  • Implications of the James Webb discoveries

    The discoveries of the James Webb telescope open new avenues of research in astronomy. Studying these primitive galaxies will help us better understand how the universe formed and how the first stars and galaxies evolved.

    Future prospects:

  • Detailed analysis of the composition and dynamics of the first galaxies.
  • Increased understanding of star and galaxy formation processes in the early universe.
  • These discoveries mark a significant advance in our quest to understand the origins of the universe and promise exciting new revelations about the earliest chapters of cosmic history.

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