First stars born later than thought
Planck pinpoints end of cosmological dark ages
![Polarization of the cosmic microwave](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/02/cc_Polarisation_of_the_Cosmic_Microwave_Background.jpg?fit=860%2C460&ssl=1)
FIRST LIGHT Light from the cosmic microwave background (coloring shows temperature differences) becomes aligned along certain directions, shown as swirling patterns, as it scatters off electrons in the early universe.
Planck Collaboration/ESA