Hello: Sorry for my english. My suggestion is probably crazy, but... We can imagine what a advanced extraterrestrial civilization can create a star artificially, like we kindle a fire. Can you imagine some technique that posibilite this? Perhaps no all stars of universe are natural, perhaps one for galaxy is artificial, for example. A artificial star, has some peculiar characteristics, a special signature that differenciate this of a natural star? If afirmative, we can explore the sky in search for these special stars, like headligths for emergent civilizations. I imagine what, if an advanced civilization has this power, they will create the star, for various reasons: for scientific experimentation, for stethics reasons, for satisfy an old dream, as demostration of power, etc... even for comercial publicity! Also as source of energy, so they no travel too far of native world.