Fuse View of Primordial Helium Traces the Structure of Early Universe
Fuse View of Primordial Helium Traces the Structure of Early Universe
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Fast Facts
News release ID: STScI-2001-27
Release Date: Aug 9, 2001
Image Use: Copyright
About this image

As the universe evolves, density fluctuations in the intergalactic gas (hydrogen and helium) grow into clumps and filaments under gravity's pull. The densest clumps form galaxies and quasars whose radiation energizes (ionizes) the remaining intergalactic gas.

Observations using NASA's Far Ultraviolet Spectroscopic Explorer (FUSE) reveal the structure of ionized helium that traces the lowest density regions of the intergalactic medium.


Tags
Cosmology, Hubble Telescope, Illustrations, Intergalactic Gas

Credits

llustration Credit: A. Feild, F. Summers and G. Kriss (STScI)