(January 26, 2015 at 2:17 am)Minimalist Wrote: In a couple of instances we'd be fried.
I'd say even in the best case, we'd be screwed, if we could even exist at all.
Arcturus is a red giant. Oops, screwed.
Polaris, Vega and Sirius are all relatively young, short libed, very luminous stars. Screwed. If they were in our solar system, they'd be red giants or white dwarfs by now (I can't recall off the top of my head if Polaris is massive enough to go supernova).
Alpha Centauri is the best case scenario, and it's a triple star, the larger two are 1.5 and .5 the luminosity of the sun. If earth orbits the larger, scorched. If it orbits the smaller, frozen.
All assuming an orbital distance of 1AU.