Hubble Spots Saturn’s Northern Lights

Earth isn’t the only planet with auroras — any world with a magnetic field and an atmosphere can get a light show around its poles when its star’s wind is blowing hard enough!* The image above shows Saturn’s northern lights, as seen in ultraviolet light by the Hubble Space Telescope’s Advanced Camera for Surveys in…

Hubble Spots Jupiter’s Spooky Northern Lights

Acquired in March 2007, this eerie image from Hubble’s Advanced Camera for Surveys’s ultraviolet camera show glowing auroral emissions, always present in Jupiter’s polar regions. The aurora is hundreds of kilometers wide and about 250 kilometers above the planet. It is caused by electrically charged particles striking atoms in the upper atmosphere from above, the…