5. Why do stars appear as points to us?
Answers
Answer:
A star is a giant spherical ball of plasma. Furthermore, all the stars that we can see (apart from our Sun) are so far away that they appear to us as perfect little dots. The answer to why we draw stars as pointy objects, is because our eyes actually see them as having points
Explanation:
Whether it's the star we plonk onto the Christmas tree, the stars that adorn our flags or pyjamas, or the stars on the Walk of Fame — they all have points!
But we all know that a real star doesn't actually have any points or spikes. A star is a giant spherical ball of plasma. Furthermore, all the stars that we can see (apart from our Sun) are so far away that they appear to us as perfect little dots.
The answer to why we draw stars as pointy objects, is because our eyes actually see them as having points.
And why? Because the lens inside each human eyeball has two imperfections called 'suture lines'.
Let's start with some anatomy.
A human eyeball is about the size of a golf ball — 25 millimetres or so. At the very front is the cornea. It does about two-thirds of the bending of incoming light. This light needs to be precisely bent so that it lands exactly on the retina — not in front, nor behind.
Answer:
This is because they are millions of kilometres farther away from the earth.....