2007-12-01 01:49:29 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Because you are talking about an extremely small angle for even the closest of stars. Beyond a certain limit, you really can't tell with any reliability, how far away the intersection of those two almost-parallel lines is. Any slight error in the angular measurement will throw off the outcome by an unacceptable margin.
2007-12-01 02:01:39 · answer #1 · answered by Brant 7 · 2⤊ 0⤋
Let's say you're at a tennis match and you are front row center court. As you watch, your head is moving left and right fairly noticeably. Easy to measure. If you were high up in the stands watching the same game, your head would hardly be moving to see the same action. More difficult to measure, therefore less accurate.
At still further distance, you wouldn't need to move your head at all - useless to try to measure.
2007-12-01 10:34:43 · answer #2 · answered by Lorenzo Steed 7 · 1⤊ 0⤋
KBW3 hit the proverbial nail squarely on the head...
I could not have answered it any better myself!
Thumbs up!
2007-12-01 10:04:42 · answer #3 · answered by Bobby 6 · 0⤊ 0⤋