Neptune And Its Moons (Proteus, Larissa, Despina And Galatea) 

What drives auroras on Saturn? To help find out, scientists have sorted through hundreds of infrared images of Saturn taken by the Cassini spacecraft for other purposes, trying to find enough aurora images to correlate changes and make movies. Once made, some movies clearly show that Saturnian auroras can change not only with the angle of the Sun, but also as the planet rotates. Furthermore, some auroral changes appear related to waves in Saturn's magnetosphere likely caused by Saturn's moons. Pictured here, a false-colored image taken in 2007 shows Saturn in three bands of infrared light. The rings reflect relatively blue sunlight, while the planet itself glows in comparatively low energy red. A band of southern aurora in visible in green. In has recently been found that auroras heat Saturn's upper atmosphere. Understanding Saturn's auroras is a path toward a better understanding of Earth's auroras.

Image Credit: NASA, Cassini, VIMS Team, U. Arizona, U. Leicester, JPL, ASI

I had to build some cat furniture and it made me think of a heavenly cat tree.

the moon is a loyal companion

Light pillars are a rare optical phenomenon in which ice crystals in the atmosphere reflect sources of light in a vertical formation. Long, illuminated beams can form above or below sources of artificial or natural light due to the air being extremely cold.

Charon, moon of Pluto, observed by NASA's New Horizons probe just before closest approach on this day in 2015. (It flew within 12,500 km of Pluto and as close as 27,000 km to Charon.)

The needle galaxy is nearly 50 million light-years away. Reddit user chucksastro used 11 hours of exposure time to capture this image from his backyard.

Undulatus asperatus

Undulatus asperatus is a new separate cloud classification currently on petition to be added to the official list of observable cloud types. If accepted as a distinct cloud type, it will be the first addition to the list of cloud types since cirrus intortus was added in 1951. It was proposed by the founder of The Cloud Appreciation Society. Recognition of the cloud classification is still pending.

The experience of these clouds is as if, it is said, one were below the Sea looking up at the surface of the water. Yet when they occur, there reportedly is little to no turbulence at the land surface. The clouds are most common in the Great Plains of the United States following thunderstorm activity in the earlier parts of the day.

Like Earth, Jupiter is home to polar auroras that light the sky as charged particles interact with the planet’s magnetosphere. A recent paper identifies interesting features in the aurora that appear similar to expanding vortex rings.(Image credit: Jupiter - NASA, ESA, and J. Nichols, aurora features - NASA/SWRI/JPL-Caltech/SwRI/V. Hue/G. R. Gladstone/B. Bonfond; research credit: V. Hue et al.; via Gizmodo)