Observing the transit of Venus was no easy task, it required careful observations and measurement. 250 years ago expeditions went out across the world to measure this amazing and rare event in order to help us understand the size of the known universe.
James Cook’s voyage to Tahiti in 1769 was the culmination of 130 years of work to observe and understand the Transit of Venus. Edmund Halley was instrumental in laying the foundations for the successful observations in 1769 and ultimately solving the Earth – Sun distance.
Next year is the 250th anniversary of James Cook’s voyage to the Pacific Ocean. One the things he did was contribute to a more accurate calculation of the distance between the Earth and the Sun by observing the transit of Venus.
TESS was launched on a Falcon 9 rocket from SpaceX on 18 April. The satellite will survey the whole sky to look for exoplanets that transit their stars.