It might be possible to live without the sun in the future with technology. But on earth that would be impossible at the moment. We wouldn’t be able to grow the plants we need to eat. We could use “lightrooms” which would mimic the sun and would be like a green house, I used to use these when I was doing my biochemistry degree. But they use a lot of power and would use all our fuel. So at the moment, no! The sun is our life line.
I don’t think so, no.. We orbit the Sun, which is just a star, but if there was no Sun, then what would we be orbiting around? The Earth was formed around our Sun when that was born, so we wouldn’t exist without our Sun either. Would we just be floating around the Universe aimlessly if we weren’t in the orbit of a heavier object? Can we even do that? I’d have to ask an astro guy – let me see if I can find Neutron Star Dude.
The Sun gives us all of the energy that we need, like heat, and sunlight energy for plants to use for photosynthesis. Animals eat the plants and get energy, and we eat animals and plants to take in that energy to power us, but it’s all basically from the Sun.
So, I say no, but the others might be able to add more to the answer!