With one flyby, we identified methane and carbon monoxide on Pluto, so why are we still uncertain about the chemical composition of Ceres?

Yes, it will. The Sun is a yellow dwarf star and holds 99.8% of the solar system's mass. Our Sun is actually relatively young, about 4.5 - 4.6 billion years old (known as Population 1 generation that are fairly rich in elements that are heavier than helium), and stars like our Sun burn for about 9 - 10 billion years.

For the next (approximately) 5 billion years, the Sun has sufficient nuclear fuel to stay as it is now, but when this fuel supply runs low, the Sun will swell and become a red giant and its surface will engulf Mercury, Venus, and most likely Earth also. This will last between a few thousand - 1 billion years. When it goes unstable it will emit shells of plasma and gas, and eventually will become a PN (planetary nebula) and this could last for about 10,000 years.

Then, whatever remains from the Sun will shrink down and become a white dwarf and will remain a white dwarf for billions of years. Once it distributes all of its remaining heat it will turn into a black dwarf; a dead star. And this is the predicted life journey of our Sun, our source of life.

Yes. It shines by generating energy from nuclear fusion, and in about 5-6 billion years, it will run out of fuel it can use. On the way, in around 5 billion years, it will swell up to become a red giant, and then collapse into a white dwarf.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.