"I wanted to use the very fine qualities of light. First of all, moonlight. There's a space where you can see your shadow from the light of Venus alone—things like this. I also wanted to gather starlight that was from outside the planetary system, which would be from the sun or reflected off of the moon or a planet...you've got this older light that's away from the light even of our galaxy. So that is light that would be at least three and a half billion years old. So you're gathering light that's older than our solar system."
