Astronomy Picture of the Day . Veins of Heaven . ... Credit Copyright: P-M Hed n ( Clear Skies , TWAN ) Explanation: Transfusing sunlight through a a still dark sky, this exceptional display of noctilucent clouds was captured earlier this month above the island of Gotland, Sweden. ... Usually spotted at high latitudes in summer months the night shining clouds made a strong showing this July. ... NASA's AIM mission provides daily projections of noctilucent clouds as seen from space . ... July . ...