What Is The Dome?

Are you looking forward to tonight's episode?

Synopsis for tonight's episode: Stephen King’s “Under the Dome” (CBS at 10) returns for Season 2 with Barbie in danger and Julie coming to the aid of a girl who may have clues about the origin of the dome.  (washingtonpost.com)

What is the dome?

Could be. . .
1. An alien force-field placed by leather headed creatures who consider  humans insignificant.
2. The dome is a living entity caused by the earth itself.
3. It's powered by the Dark Tower.
4. The result of an alien spaceship.

. . . I HAVE NO IDEA.

Here seems to be the guidelines (they're different than the book)

• Weather, rain, so on can pass through.
• The Dome itself gives some people visions of pink stars falling.
• The Dome goes deep into the earth.  You can't dig your way out (sorry Maggie Simpson.)
• The Dome gives an electric charge and can jolt people with pacemakers, hearing aids and other electrical devices.
• The Dome appears to have a will of its own and can direct peoples behavior at times.
• The Dome that appears to in some way control the Dome itself.