Observe  Jupiter’s Great Red Spot in December 
For those who own a telescope, December is a great time to observe Jupiter’s Great Red Spot. Because Jupiter spins around its axis much faster than Earth, completing a full day-night rotation in around 9hrs and 55 minutes, the GRS won’t always be visible. December 2, from 11pm to 12am GMT, is one of the best times to observe the GRS from Earth. In case you won’t make it, Sky and Telescope has a calculator to predict further times and dates when the center of the Great Red Spot should cross Jupiter’s central meridian:http://www.skyandtelescope.com/observing/objects/javascript/3304091.html
Image credit: Eye of the storm, detail from Björn Jónsson’s mosaic of Jupiter’s Great Red Spot from Voyager 1 data

Observe  Jupiter’s Great Red Spot in December 

For those who own a telescope, December is a great time to observe Jupiter’s Great Red Spot. Because Jupiter spins around its axis much faster than Earth, completing a full day-night rotation in around 9hrs and 55 minutes, the GRS won’t always be visible. December 2, from 11pm to 12am GMT, is one of the best times to observe the GRS from Earth. In case you won’t make it, Sky and Telescope has a calculator to predict further times and dates when the center of the Great Red Spot should cross Jupiter’s central meridian:http://www.skyandtelescope.com/observing/objects/javascript/3304091.html

Image credit: Eye of the storm, detail from Björn Jónsson’s mosaic of Jupiter’s Great Red Spot from Voyager 1 data