PV Gap

Jennifer Said:

Could we create a portable sun that we could transport with us from one galaxy to another?

We Answered:

Let's just state, for starters, that handles are going to be hard to install.

Assuming that you belong to a sufficiently advanced enough civilization with technology that would allow this sort of things, you could presumably accelerate and deflect enough large meteorites to pass close enough and transfer enough momentum to yank a planet out of its orbit If you now use enough deflected planets, properly aimed, you could also used the attraction of all those bodies to deflect large bodies, including stars.

Me thinks that could be done, but over the course of million -- if not billion -- of years, so early planning would be required.

Now, why would someone want to bring along a star, when those things are everywhere already?

If all you need is energy, the "portable sun" might be simply a thermonuclear reactor; which is supposed to do the same thing the sun does: fuse hydrogen nucleus together into helium and give off energy.

Jenny Said:

is there any small portable solar system in the market now?

We Answered:

The following is expensive, but high quality. It's still is only useful for relatively low power devices, so you could not run most laptops off of it continuously.