I don't know where you live but from my place the sun is never larger than my hand. My monitor is bigger than that

You can take macro pictures of celestial objects, in the same way you take a macro of an elephant. You just take a closup of its surface. The problem might be the cost. I cannot afford a flight ticket to Kenya or wherever the elephants grow but you might. But I doubt even you could buy a ticket to the sun. Besides, an elephant may allow you to come close enough to macro but I don't think the sun would be that friendly.