Battlestar Galactica Easter Egg - Serenity

In the beginning of Battlestar Galactica (about the first 16 minutes into the Battlestar Galactica premiere episode) you can see the ship Serenity from the TV series Firefly, flying just outside the window.

The same VFX team at Zoic Studios that created the effects for Firefly also did Battlestar Galactica.