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GordonHaynes shared a photo from Flipboard
Sh2-129 (Flying Bat Nebula) and OU4 (Giant Squid Nebula) in the constellation Cepheus. Sh2-129 only emits in Ha and SII and is the larger of the two nebula in the greenish yellow colour. OU4 was only discovered by chance in 2011 by French astroimager Nicolas Outters, it is incredibly faint and only emits in OIII, it is the blue coloured nebula and is thought to be a bi-polar planetary nebula. It requires a lot of data and some considerable stretching during processing just to get it to show
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