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From Wikipedia: &quot;This article is about the Sun and its planetary system. For other similar systems, see Star system and Planetary system.&quot;<p>&gt;You would need a colossal amount of energy to maintain that acceleration. I would believe 8 years, but the system is already 4 light years away.<p>And your belief is wrong.  I already gave you a reference.  The trip takes less than the distance in light-speed.  A trip to the center of the galaxy at even 0.1g acceleration takes far, far less than the lightyear distance, in ship-time.