Sunday Space: The secrets of the stars hidden in their rainbows

By Adam Rains
Updated July 1 2021 - 4:13pm, first published March 28 2020 - 5:30pm
The barcode of the Sun. A very long spectrum was chopped in small chunks and then displayed one on top of another. Credit: NOAO/AURA/NSF

We've all seen stunning images showcasing the diversity and beauty of objects in space - from majestic spiral galaxies, colourful nebulae, or even the still mysterious planets in the Solar System. Such pictures have taught us much, but photography isn't the only tool used by the astronomers of the world.