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单词 Giotto
释义
Giotto

Astronomy
  • The European Space Agency’s first space probe, launched to Halley’s Comet in 1985 July. It flew within 600 km of the sunward side of Halley’s nucleus on 1986 March 14, taking close-up images and analysing the comet’s dust and gas. Although battered by dust from the comet, Giotto survived and in 1990 July became the first spacecraft to use the Earth in a gravity-assist manoeuvre, when it was retargeted to Comet Grigg–Skjellerup; it passed 200 km from that comet’s nucleus in 1992 July, after which Giotto was switched off.

    http://sci.esa.int/giotto/31716-summary/ ESA mission website.


Space Exploration
  • The European Space Agency’s first deep space mission, part of an ambitious international effort to solve the mysteries surrounding Halley’s Comet. It was also the first to image a comet nucleus. Launched by an Ariane rocket in July 1985, Giotto passed within 600 km of Halley’s Comet’s nucleus on 13 March 1986 and found the first evidence of organic material on a comet. On 2 July 1990, it flew within 23 000 km of the Earth, which diverted its path to encounter its next target: comet Grigg–Skjellerup, on 10 July 1992. Giotto made the closest comet fly-by to date by any spacecraft (about 200 km from the comet’s nucleus) and studied the interaction between the solar wind, the interplanetary magnetic field, and the comet itself. The mission completed in 1992.


Geology and Earth Sciences
  • An ESA mission, launched on 2 July 1985, to the comets Halley and Grigg–Skjellerup. The mission ended on 23 July 1992.

    http://sci.esa.int/science-e/www/area/index.cfm?fareaid=15 An ESA mission launched in 1985 that studied Halley’s Comet.


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