Sunshine (2.007)

By the time you get this message, I'll be in the dead zone. It came a little sooner than we thought, but this means you won't be able to send a message back. So, I just wanted to let you know that I don't need the message because I know everything you wanna say. Just remember it takes eight minutes for light to travel from sun to Earth, which means you'll know we succeeded about eight minutes after we deliver the payload. All you have to is look out for a little extra brightness in the sky. So if you wake up one morning and it's a particularly beautiful day, you'll know we made it. Okay, I'm signing out and I'll see you in a couple years.