Transit Of Venus Across The Sun

- Measurements made of the apparent diameter of Venus during the transit, and comparison with its known diameter, will give scientists an idea of how to estimate exoplanet sizes.
- Observation made of the atmosphere of Venus simultaneously from Earth-based telescopes and from the Venus Express gives scientists a better opportunity to understand the intermediate level of Venus' atmosphere than is possible from either viewpoint alone. This will provide new information about the climatology of the planet.
- Spectrographic data taken of the well-known atmosphere of Venus will be compared to studies of exoplanets whose atmospheres are thus far unknown.
- The Hubble Space Telescope used the Moon as a mirror to study the light that bounces off Venus to determine the makeup of its atmosphere. This will be a technique that astronomers could also use to study exoplanets.