Planck telescope puts new date stamp on first stars
Scientists working on Europe's Planck satellite say the first stars in the Universe lit up later than was previously thought.
The team has made the most precise map of the "oldest light" in the cosmos.
Earlier observations of this radiation had suggested that the first generation of stars burst into life about 420 million years after the Big Bang.
The new Planck data now indicates they fired up around 560 million years after the Universe got going.
Pallab Ghosh reports.
05 Feb 2015
- From the section Science & Environment