00:01
Okay, we know that the earth moves, the earth moves in an elliptical orbit with the sun at one of the foci.
00:31
The length of half of, and let me go ahead and draw this out.
00:38
This might be easier than me trying to say the words.
00:41
And let's go ahead and here we have the sun.
00:49
We have, here's the earth, not drawn to scale, of course.
00:55
And so we have the earth going around the sun in an elliptical orbit.
01:07
And we are told that the length of half of the major axes is 149 ,598 ,000 kilometers.
01:35
And the eccentricity is 0 .001.
01:45
Nope, not two zeros, only 1 .0 .0 .0 .0 .0 .0.
01:52
Seven and we want to find the minimum distance of the earth from the sun and the maximum distance of the earth from the sun.
02:10
Okay and so what we need to do is first of all we know that if this is the center then this distance from here to here is is a and a is that length right here.
02:39
And then we also know at the foci, so if we have two foci here and of course the sun, the distance from the center to the foci is that c units.
03:00
And so i have those units right here...