I WONDER - How Many Stars Are There In The Universe?

The video explores the vast number of stars in the universe, comparing them to grains of sand on Earth. It explains that there are over 200 billion trillion stars, a number written as two followed by 23 zeros. Despite this, only about 5,000 stars are visible from Earth. The video also highlights that some of the stars we see are from thousands or even millions of years ago, due to the time it takes for their light to reach us.

Why is it difficult for us to imagine the vast number of stars?

What does it mean when we see some stars from thousands or millions of years ago?