As I understand it, the Sun will transition from its current phase as a 'yellow dwarf', to a red giant, and finally to a white dwarf.

Even during these phases I understand there are transitional considerations, including the increases in luminosity nearing the end of the main phase, reduced temperatures, various ejections and other things being put into solar system, and even the formation of a nebula during the white dwarf phase.

At each stage, sub-stage, and during each transition of the Sun, is there a region the Earth could theoretically orbit and support life similarly to how it does today?

  • 1
    $\begingroup$ You're asking if there is a habitable zone, or if Earth can somehow survive those stages? The former yes, the latter no. $\endgroup$ – AtmosphericPrisonEscape Oct 14 '17 at 17:07
  • 1
    $\begingroup$ No I don't. Why do you assume I assume such a thing? $\endgroup$ – AtmosphericPrisonEscape Oct 14 '17 at 17:18
  • 2
    $\begingroup$ That's two different things. The habitable zone is a theoretical concept and is based on shifting an equivalent-Earth wherever you want, to see if liquid water would exist on its surface. The habitable zone of this definition exists around any stellar-type body. The actual survival will be hampered by Earth spiraling into the red giant sun due to tides. $\endgroup$ – AtmosphericPrisonEscape Oct 14 '17 at 17:32
  • 2
    $\begingroup$ This sounds more like a subject for {Worldbuilding SE](worldbuilding.stackexchange.com) rather than Astronomy SE. Once we're adding fantasy tech to change Earth's orbit (and without somehow damaging Earth's eco system) we're way past conventional science IMO. $\endgroup$ – StephenG Oct 15 '17 at 5:56
  • 2
    $\begingroup$ Please don't sent this to Worldbuilding Stack Exchange; it's not about worldbuilding - it's just speculative. $\endgroup$ – HDE 226868 Oct 15 '17 at 17:19