“Dawn”的概念、定义、翻译、参考文献-科学参考

Dawn

Astronomy

A NASA space probe to the asteroids Vesta and Ceres, launched in 2007 September. Dawn used ion propulsion to travel to Vesta, arriving there in 2011 July and going into orbit around it until 2012 September when it left for Ceres. In 2015 March the probe went into orbit around Ceres to repeat its studies. Dawn carries two German-made cameras to photograph the asteroid’s surfaces, as well as two spectrometers to study the mineral composition and a magnetometer to search for magnetic fields. The mission ended in 2018 October when Dawn ran out of fuel.
http://dawn.jpl.nasa.gov/ Official mission website.

Space Exploration

A NASA spacecraft launched in 2007 that is visiting the dwarf planet Ceres and asteroid Vesta to map their surfaces, measure their size, shape, and composition, and take close-up images of a pair of bright spots on Ceres. Being relics from the early days of the Solar System, these objects should contain evidence of the conditions present during the birth of the planets. Dawn reached Vesta in 2011 and orbited it for 14 months. Dawn then moved on to Ceres, reaching it in December 2014 and entered its orbit in March 2015. Primary operations at Ceres ended on 30 June 2016 before the mission was extended on 1 July 2016. In October 2017, NASA officials decided that Dawn should remain at Ceres until it ran out of fuel, in October 2018. In March 2018, Dawn detected recent variations in the surface of Ceres, revealing that it is a dynamic body that continues to evolve and change.
In October 2017 the Dawn spacecraft at dwarf planet Ceres was extended until the craft ran out of fuel. This artist’s concept shows the spacecraft firing its engines over Ceres.
Credit: NASA/JPL-Caltech

单词	Dawn
释义	Dawn Astronomy A NASA space probe to the asteroids Vesta and Ceres, launched in 2007 September. Dawn used ion propulsion to travel to Vesta, arriving there in 2011 July and going into orbit around it until 2012 September when it left for Ceres. In 2015 March the probe went into orbit around Ceres to repeat its studies. Dawn carries two German-made cameras to photograph the asteroid’s surfaces, as well as two spectrometers to study the mineral composition and a magnetometer to search for magnetic fields. The mission ended in 2018 October when Dawn ran out of fuel. http://dawn.jpl.nasa.gov/ Official mission website. Space Exploration A NASA spacecraft launched in 2007 that is visiting the dwarf planet Ceres and asteroid Vesta to map their surfaces, measure their size, shape, and composition, and take close-up images of a pair of bright spots on Ceres. Being relics from the early days of the Solar System, these objects should contain evidence of the conditions present during the birth of the planets. Dawn reached Vesta in 2011 and orbited it for 14 months. Dawn then moved on to Ceres, reaching it in December 2014 and entered its orbit in March 2015. Primary operations at Ceres ended on 30 June 2016 before the mission was extended on 1 July 2016. In October 2017, NASA officials decided that Dawn should remain at Ceres until it ran out of fuel, in October 2018. In March 2018, Dawn detected recent variations in the surface of Ceres, revealing that it is a dynamic body that continues to evolve and change. In October 2017 the Dawn spacecraft at dwarf planet Ceres was extended until the craft ran out of fuel. This artist’s concept shows the spacecraft firing its engines over Ceres. Credit: NASA/JPL-Caltech
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