Sterne by Thomas Ruff

Postcard DE-3784060 from Germany shows an image of night sky from the collection Sterne 
(Stars) produced by German photographer Thomas Ruff in 1989. Thomas Ruff acquired a set of 600 negative images "Catalog of the Southern Sky" from the European Southern Observatory in the Andes, Chile. Each of those images was noted for the precise time of day and exact geographic position when the photograph was taken, along with the type of telescopic lens used and length of exposure. Thomas Ruff cropped specific details from those images and enlarged them to a uniform grand scale.

Separately, a pulsar, J1906,  made the news as it has faded from view when it enters a warp in space-time. The observations were made at the Arecibo Observatory, Puerto Rico.

Blood Moon in Sky

Postcard US-1651277 to Russia shows various nightlife in Florida under a "blood moon".

In the early morning of April 15, 2014 when a total lunar eclipse occurred, the "blood moon" was visible from most of North and South America, Hawaii and parts of Alaska. A total lunar eclipse occurs when the moon, the earth, and the sun are in alignment. As a result, the moon is completely covered by the Earth’s shadow. The following photo shows the total eclipse of the moon underway over Las Vegas, Nevada as seen from West Sahara Avenue and South Valley View Boulevard around 12:40 am on April 15, 2014. The bright star on the lower-right corner is Spica from the constellation Virgo, the 15th brightest star in the sky.

The eclipse was the first of four consecutive total lunar eclipses, known as a tetrad, on April, 15, 2014, October 8, 2014, April 4, 2015, and September 28 2015.