Neutral hydrogen

An illustration illustrating the rotation of neutral hydrogen (right) in galaxies located in an elongated galaxy (middle), with the galaxies showing a coherent overall rotational motion that follows the large-scale cosmic fabric (left).

One of the largest rotating structures ever seen: a giant cosmic filament where galaxies spin “in the same direction”

  • One response
Faint radio glow from the early universe may hold hidden clues about the first stars. Illustration: depositphotos.com

13-billion-year-old radio signal may reveal the first stars in the universe

  • One response
An international team led by the University of Cambridge shows that the 21-centimeter signal from hydrogen atoms at cosmic dawn is sensitive to the mass of the first stars (Population III), and that the REACH and SKA radio observatories will be able to map how the universe evolved.
(Left) A radio image of neutral hydrogen in and around NGC 4532 / DDO 137 using ASKAP. (Right) Optical image of the galaxy from the Legacy surveys. Credit: ICRAR and D. Lang (Perimeter Institute).

A 1.6 million light-year-long gas bridge has been revealed between two dwarf galaxies.

  • No comments
Astronomers have discovered a unique cosmic structure in the Virgo Cluster – a 156 light-year-long neutral hydrogen bridge connecting two dwarf galaxies, extending into a vast gas tail with a record length of 1.6 million light-years.
Bubbles above and below the Milky Way galaxy. Illustration: Fermi Telescope on NASA's website

“Impossible” Cold Clouds Inside Fermi Bubbles Located Above and Below the Milky Way

  • No comments
Discovery of dense clouds of neutral hydrogen at the center of vast structures challenges hypothesis about age and stability of Fermi bubbles
Science website logo
SEARCH