"Measuring with a ruler the Sun turns out to be harder than we thought because he was really bigger than predicted, " says Wright.
Therefore, any Jubier and Wright can't estimate in detail how the size of the Sun. They just refer to the size of the last specified the International Astronomical Union, which at the time estimated the Sun has a radius 432,280 miles (695,700 kilometers).
The size of the Sun first announced by astronomer Arthur Auwers named Germany in 1891. At that time, he used the method of photosphere by observing the size of the Sun directly. The difference is, this time the size of the Sun having a radius of 432,470 miles (696,000 km).