We all know it is using parallax. But I didn't understand how we can actually measure the parallax angle. Finally this link explained it well. It is because we know the angle subtended by telescope's field of view.
If whole picture is 10 degrees and picture width is 10 centimeter and star seems to move 1 centimeter its angle is 1 degree. of course at 1 degree we will be fried to death - but that was just an example!
No comments:
Post a Comment