Search PBS Space Time


2019-02-07: Sound Waves from the Beginning of Time

  • 05:57: But the plasma, now hydrogen and helium gas, stalled.

2017-05-31: The Fate of the First Stars

  • 02:32: ... in the first ever proto galaxies, born of the pristine hydrogen and helium gas that filled the universe soon after the Big ...
  • 07:22: But without materials to help cooling, a giant cloud of pristine hydrogen helium gas can't shed its heat quickly enough.
2 result(s) shown.