by NoelC » Fri Jan 15, 2010 5:57 pm
Orion isn't directly overhead. It looks as though it appears roughly 45 degrees above the horizon in both of these shots. 45 degrees + 45 degrees makes up your 90 degrees. [Actually it's a little more in both images, but I'm oversimplifying to match the question.]
Keep in mind that the 0 degree division between the northern and southern skies is very close to Orion's belt, so it will be at about the height in the sky of the latitude of the observer.
Another perspective: In the northern Hemisphere you can see the north star, while the constellation Octans, near the southern pole, is hidden below the horizon. In the southern hemisphere Octans is above the horizon while the north star is hidden. While looking at Orion from the northern hemisphere shot the north star is "up" (behind your head), while in the southern hemisphere Octans is "up" (behind your head)
-Noel
Orion isn't directly overhead. It looks as though it appears roughly 45 degrees above the horizon in both of these shots. 45 degrees + 45 degrees makes up your 90 degrees. [Actually it's a little more in both images, but I'm oversimplifying to match the question.]
Keep in mind that the 0 degree division between the northern and southern skies is very close to Orion's belt, so it will be at about the height in the sky of the latitude of the observer.
Another perspective: In the northern Hemisphere you can see the north star, while the constellation Octans, near the southern pole, is hidden below the horizon. In the southern hemisphere Octans is above the horizon while the north star is hidden. While looking at Orion from the northern hemisphere shot the north star is "up" (behind your head), while in the southern hemisphere Octans is "up" (behind your head)
-Noel