2004 Venus Transit - Egress ()

This movie shows the egress of Venus from the solar disk. The shivering and occasional fuzziness is due to turbulence in the Earth’s atmosphere - what astronomers call ’seeing’. Note the moment of bad seeing around frame 1713. You can see a hint of the notorious ’black drop’ effect that confused the observers trying to time the contact during the earlier transits. By frame 1728 the seeing is better again and 3rd contact is close to frame 1730. (The frame numbers correspond to the jpeg file numbers.) Observed with the Swedish 1-m Solar Telescope (SST). credit: Royal Swedish Academy of Sciences source: