At more than 8 billion miles from the sun, the temperature on Sedna never gets above minus 400 degrees Fahrenheit.
"The sun appears so small from that distance that you could completely block it out with the head of a pin," said Mike Brown, an astronomer at California Institute of Technology, who led the research team.
I hate to nit-pick, but I believe you can block out the sun with the head of a pin on Earth too. You just have to hold the pin right in front of your eye. Or inside it.
Link: Wired.com: "Welcome to S-s-s-s-edna"
Cubey Terra