Because in the first place, Earth is never exactly "this" distance form the sun. It goes closer and further away during its orbit.
Secondly, the sun is not a consistently sized sphere. It bulges and crumps up and spits and wobbles; what was the surface yesterday might now be tens of kilometres deep, or hundreds of kilometres away from the surface into space.
Third, the methods used to determine the distance rely on slight errors in the tools used and the methodology; while several methods can give very close answers, they will never be perfect.
yes but the movie isnt it
Believe me sweetie he isnt.
THERE ISNT ONE IVE TRIED THE PRODUCERS DIDNT ENTER ONETHERE ISNT ONE IVE TRIED THE PRODUCERS DIDNT ENTER ONE
no. there isnt any angry birds shoes.
No he isnt they broke up!
The change in distance is not very significant. Note that when it is Summer in the northern hemisphere, it is Winter in the south, and vice versa. This has nothing to do with the distance from the Sun, which is practically the same for North and South.
16 and a 1/2 to be exact but no he isnt.
Isnt that what Mapquest is for...?
"Can" isnt' a standard measurement, so the question is unanswerable: do you mean a Vienna sausages can? A soup can? A paint can?
well selena's hair isnt an exact lenghth because she keeps cuttin it
Infinity is not defined in exact terms, so there's no sense of diff. & intg. It, but if it is to be taken as constant that we have, infinity + 1 = infinity, it should be zero then, but it isnt practical..
Sorry no there isnt. Sorry no there isnt.
no it isnt ok isnt ok isnt ok dadyyouve been stuck by a food criminal
Lots of animals are brought in the no kill animal shelter. There isnt really an exact number because every day animals are brought there!!(:
Isnt it indian??? Isnt it indian???
no it isnt but it isnt the teachers choice
no there isnt that mite be a fib or a legent but there isnt