Solar engineering
Just hypothetically if we possessed the technology to create fusion reactions to form new stars could we postpone the heat death of the universe?
Or would the energy we need to create these reactions just drain it faster?
Slightly shorter term, could the same technology create a new sun in our solar system? What size object would be needed to create a similar sized sun a similar distance from Earth? E.g. if we sacrifice Pluto as 'kindling' for our new sun would it be bigger than Sol is now?
Yeah, slow day at work.