Washington DC
ASTRONOMERS have discovered the Universe’s true colour—it’s somewhere
between pale turquoise and aquamarine. This finding is helping them trace the
history of star formation.
Ivan Baldry and Karl Glazebrook from Johns Hopkins University in Baltimore
identified the universal hue by bringing together light from over 200,000
galaxies within 2 billion light years of Earth.
Combining the light gave a peak in the blue part of the optical spectrum,
from the large number of young stars burning hydrogen, and another in the red
part of the spectrum, which comes from the glow of older red giants burning…
