[00:01] distance to the Sun without knowing its size and how could you do this on your own you again use the moon you look at phases of the moon so the sun illuminates half of the the moon at any
[00:13] given time and so we on Earth we also see half the moon but it's a different half um and so because of that we get phases of the moon so sometimes you get over here um and sometimes sometimes you get a half half moon you can pretty much
[00:26] estimate the distance to the Sun by asking when exactly a Half Moon occurs halfway between a new moon and a full moon but that's actually not true Half
[00:38] Moon occurs not not when the Moon and the Sun make a right angle at the Earth but actually when the Earth and the Sun make a right angle at the Moon hopefully this makes some sense for us to see a half moon it means that the side of the
[00:51] moon that we see facing Us overlaps by exactly 90° with the side of the Moon being illuminated by the sun which in turn means we have have a right angle at the spot labeled here half moons are slightly closer to new moons than they
[01:05] other full moons of course in this graphic the effect is very exaggerated because the sun is being drawn so close to the Earth how far away the sun is determines when exactly that Half Moon occurs the farther away the closer it is
[01:17] to the true halfway point and if you can walk out that right angle triangle involving the distance of the Moon this is the Sun and