 Are you expecting to see images like these in the telescopes tonight? I'm not sure. Okay, well for the most part, no. Your eyes work very differently from a camera that would produce photos like these. Mainly it's because our eyes can't take a time exposure, like a camera can. Our eyes act like snapshots. The light comes into our eye, the signal passes on to our brain, and is gone. Will staring at my face make it any brighter? No. No, okay. Well, here's a galaxy far out in space. Hold it over the telescope opening here. There you go. And we'll use these grains to represent photons or packets of light coming from this galaxy and hitting this area in one second. Okay? 1001. Okay, let's see. Now that's all the light that our eye will pick up from the telescope. You'll see a little fuzzy patch of light when you look through the scope. Now let's pretend that there's a CCD camera, like a digital camera, connected to the telescope. That can collect photons over a longer period of time. Okay? So now let's take a time exposure and sprinkle these photons into the telescope for about five seconds. Here, you want to do that? Yeah. Okay. 1001, 1002, 1003, 1004, 1005. Okay. Now let's see. Oh, cool. How do you do that? Okay. Well, now a camera can collect and produce a much brighter image than you'll see with your eye. Professional telescopes like NASA uses don't use eye pieces. Even if you could go up in space to the Hubble Space Telescope, you wouldn't be able to look through it. Those telescopes use various kinds of detectors and light collecting devices like CCD cameras to allow us to understand the universe by analyzing the light they collect. But when you look through the telescopes tonight, you'll be experiencing the real universe, not photographs. So what are we going to see tonight?