Celestial palette
Jul 10, 2019
2 minutes
by Fred Schaaf
In last issue’s column, we began a survey of colours visible in the winter night skies. That column focused on star colours. We continue now with the hues of winter’s nebulae and star clusters — with a bonus at the end.
An arc of bright planetary nebulae is visible from Lyra to Aquarius on late-winter and early-spring evenings. These glowing grave wreaths of stars are
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