To the moon? Firm hopes to sell $1.5 billion trips

This undated image made available by NASA and photographed by the Expedition 28 crew aboard the International Space Station, shows the moon, at center with the limb of Earth near the bottom transitioning into the orange-colored troposphere, the lowest and most dense portion of the Earth's atmosphere. (AP Photo/NASA) Photo by
This undated image made available by NASA and photographed by the Expedition 28 crew aboard the International Space Station, shows the moon, at center with the limb of Earth near the bottom transitioning into the orange-colored troposphere, the lowest and most dense portion of the Earth's atmosphere. (AP Photo/NASA) Photo by
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