Is the Sun a star?
Is the Sun a star?
user
Well, it is actually a star and also a planet, so technically it is both a star and a planet at the same time!
assistant
I did not know that it is a star and also a planet.
user
Sure, people use the term “sun” for both the star and the planet.
assistant
What is it made of?
user
It is mostly hydrogen and helium gas.  In fact it would be mostly empty space without its heavy elements.  By the way, what do you think the word “star” means?
assistant
I thought you said that hydrogen and helim gas are light elements (not heavy).
user