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Comet Lovejoy (C/2014 Q2) by: Troy Casswell

Neptune and its moons (Proteus, Larissa, Despina and Galatea) 

Credit: NASA / Hubble (infrared)

Sprite (lightning)

Sprites or red sprites are large-scale electrical discharges that occur high above thunderstorm clouds, or cumulonimbus, giving rise to a quite varied range of visual shapes flickering in the night sky. They are usually triggered by the discharges of positive lightning between an underlying thundercloud and the ground.

Sprites appear as luminous reddish-orange flashes. They often occur in clusters above the troposphere at an altitude range of 50–90 km (31–56 mi). Sporadic visual reports of sprites go back at least to 1886, but they were first photographed on July 6, 1989 by scientists from the University of Minnesota and have subsequently been captured in video recordings many thousands of times.

Sprites are sometimes inaccurately called upper-atmospheric lightning. However, sprites are cold plasma phenomena that lack the hot channel temperatures of tropospheric lightning, so they are more akin to fluorescent tube discharges than to lightning discharges. source, images

In early 2001 during a launch of Atlantis, the Sun, Earth, Moon, and rocket were all properly aligned for this photogenic coincidence.

Image Credit: Pat McCracken, NASA

Dirty thunderstorm

A dirty thunderstorm (also volcanic lightning, thunder volcano) is a weather phenomenon that is related to the production of lightning in a volcanic plume.

A study in the journal Science indicated that electrical charges are generated when rock fragments, ash, and ice particles in a volcanic plume collide and produce static charges, just as ice particles collide in regular thunderstorms.

Volcanic eruptions are sometimes accompanied by flashes of lightning. However, this lightning doesn’t descend from storm clouds in the sky. It is generated within the ash cloud spewing from the volcano, in a process called charge separation.

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images

Solar System

The Big Dipper

by: VegaStar Carpentier

Neptune ♡

This color image, produced from a distance of about 16 million kilometers, shows several complex and puzzling atmospheric features. Credit: NASA/JPL

Titan, Enceladus, Tethys, Pandora, & Epimetheus. October, 2007.

NASA/JPL-Caltech/SSI/CICLOPS/Kevin M. Gill

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