"On the probable error of a meridional transit observation by the ' eye and ear ' and chronographic methods", ib., xxiv, 152-60.
Since the inclination is known by transit observation, the true mass is known.
He used his transit observation to demonstrate that Venus was, at least sometimes, below the Sun in the Ptolemaic cosmology.
The purpose was to make transit observations of eleven stars whilst similar observations were made in Melbourne and Sydney.
A successful transit observation would provide information about the planet's size, composition, and atmospheric conditions.
In March 2010, transit observations using HI Lyman-alpha found that this planet is evaporating at a rate of 1-100 gigagrams per second.
On the day of the transit observation, Cook recorded:
He devoted himself, however, assiduously to their repair, and his first transit observation is recorded on the 25th July, 1742.
The radius found by the transit observations show that it has a radius 25% larger than Jupiter.
Time ball stations set their clocks according to transit observations of the positions of the sun and stars.
