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Uncovering the Mysteries of Jupiter's Aurora
The bright emissions above the dark blue background of this ultraviolet image of Jupiter are auroral lights, similar to those seen above the Earth's polar regions. The aurorae are curtains of light resulting from high energy electrons following the planet's magnetic field into the upper atmosphere, where collisions with atmospheric atoms and molecules produce the observed light.
Internet Explorer users
Right Click on the image and select Set as Background.
Netscape Navigator users
Right Click on the image and select Set as Wallpaper.
Mac users
Hold down the mouse button over the image and wait for the menu.
Choose Save Image As.
Open the control panel to Desktop Pictures.
Click Select Picture and load the file you just saved.
Choose Position Automatically.

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