Photos: Out of this world images from NASA
Credit: NASA
Mariner 10's Portrait of Venus - On Feb. 5, 1974, Mariner 10 took this first close-up photo of Venus. Made using an ultraviolet filter in its imaging system, the photo has been color-enhanced to bring out Venus's cloudy atmosphere as the human eye would see it. Venus is perpetually blanketed by a thick veil of clouds high in carbon dioxide and its surface temperature approaches 900 degrees Fahrenheit.
Other Slideshows
PHOTOS: Behind the scenes 
I-5 bridge over Skagit River collapses, cars with people in water
Peek Inside: Stan Musial's $1.8M Ladue home for sale
Dresses Kellie Pickler wore on 'DWTS'
Photos: Warming up for Senior PGA Championship at Bellerive
Remains of KC-135 airmen return to Fairchild AFB
