 Where's Saturn? Is that a UFO--or the ISS? What's the name of that star? Get the answers from mySKY--a fun new astronomy helper from Meade. . MARTIAN CAVES: NASA's Mars orbiters have spotted "skylights" apparently leading to cavernous underground spaces on Mars. The discovery is fueling interest in potential underground habitats and sparking searches for caverns elsewhere on the Red Planet. Get the full story from Science@NASA. AURORA WATCH: High-latitude sky watchers should be alert for auroras tonight. A high-speed solar wind stream is buffeting Earth's magnetosphere and this could spark a geomagnetic storm. Here is the view this morning from Iceland: 
Photo details: Nikon D200, Sigma 10-20mm lens, ISO 1600, 30s
"The auroras were very active over the Reykjavik region," says photographer Niels Giroud. September 2007 Aurora Gallery
[August 2007 Aurora Gallery] [Aurora Alerts] MAXIMUM VENUS: In a celestial coincidence of eye-catching proportions, Venus reaches maximum brightness for all of 2007 on Sept. 23rd, the autumnal equinox. In short, northern fall is beginning with a bright light in the dawn sky. How bright? This morning in Florida, Howard Eskildsen saw Venus after sunrise: 
"The clouds over Ocala parted to reveal Venus and a deep blue sky framed by fragile fluffs of clouds," he says. Shining at magnitude -4.5, Venus is 10 times brighter than Jupiter and 16 times brighter than Sirius--the brightest star in the heavens! And while Venus is visible in broad daylight, it is easier to find before sunrise. No sky map is necessary. Simply look east for the brilliant light. BONUS: Got a backyard telescope? Point it at Venus. Like the Moon, Venus has phases, and at the moment it is a beautifully slender crescent. Take a look! | 
