![]() ![]() Īll photos on this page may be downloaded and used, provided the photographers (authors) and the VT-2004 programme are indicated as source. For example a very cheap webcam, the Philips SPC230NC is a 1.3Mpixel CMOS chip, but its Minimum Illumination is 5 Lux (the amount of light it can detect and requires to operate effectively), whereas the SPC900NC's CCD chip has a Minimum Illumination of < 1 Lux, and hence why it is so popular for astrophotography. ![]() The same phenomenon was observed on some photos taken when Venus "entered" and "exited" the solar disc at the time of the transit.Īn overview of the VT-2004 Photo Archive is available and a number of these photos have been elected "VT 2004 Photo of the Day". At the same time, some of the sunlight was refracted through the Venusian atmosphere, creating the effect of an illuminated, partial "ring". Consequently, the illuminated part of the disc steadily diminished and right before the transit on June 8, Venus' crescent had become extremely thin. ![]() Please note that the orientations of these photos depend on the equipment used and are therefore not uniform.Įarly in 2004, Venus was about "half", but as it moved along its orbit between the Sun and the Earth, we began to see it more and more "from behind". On this page, photos of Venus's phases are displayed in chronological order, as they were photographed before and after the Venus transit on Jand are now shown at the VT-2004 website. This contributed to convince him that Venus moves around the Sun and is illuminated by this body and that the Sun, not the Earth, is at the centre of the world. The famous Italian scientist Galileo Galilei (1564 - 1642) first observed Venus's phases in 1610 with the recently invented telescope. Moving around the Sun on an orbit inside that of the Earth, Venus displays phases like the Moon, cf. ![]()
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