NGC 7023: The Iris Nebula

These cosmic clouds have blossomed 1,300 light-years away, in the fertile starfields of the constellation Cepheus. Called the Iris Nebula, NGC 7023 is not the only nebula to evoke the imagery of flowers. Still, this deep telescopic image shows off the Iris Nebula’s range of colors and symmetries, embedded in surrounding fields of interstellar dust. Within the Iris itself, dusty nebular material surrounds a hot, young star. The dominant color of the brighter reflection nebula is blue, characteristic of dust grains reflecting starlight. Central filaments of the reflection nebula glow with a faint reddish photoluminesence as some dust grains effectively convert the star’s invisible ultraviolet radiation to visible red light. Infrared observations indicate that this nebula contains complex carbon molecules known as PAHs. The dusty blue petals of the Iris Nebula span about six light-years. via NASA

Wikipedia article of the day for September 3, 2021

Wikipedia article of the day is Battle of Dunbar (1650). Check it out: Article-Link Summary: The Battle of Dunbar was fought between the English New Model Army, under Oliver Cromwell, and a Scottish army, commanded by David Leslie, on 3Β SeptemberΒ 1650 near Dunbar, Scotland. The first major battle of the Third English Civil War, it was decisively won by the English. The English crossed into Scotland in July, and Cromwell attempted to draw the Scots into a set-piece battle, but the Scots resisted. At the end of August Cromwell withdrew to the port of Dunbar. The Scottish army followed, and before dawn the English launched a surprise attack on the Scots, who were poorly prepared. The fighting was restricted to the north-eastern flank. Lesley was unable to reinforce those fighting, while Cromwell used his last reserve to outflank the Scots. The Scottish cavalry broke and routed; the Scottish infantry made a fighting retreat but suffered heavily. Between 300 and 500 Scots were killed, with approximately 1,000 wounded and about 6,000 or more taken prisoner from an army of 12,500 or fewer.