“Wilkinson Microwave Anisotropy Probe”的概念、定义、翻译、参考文献-科学参考

Wilkinson Microwave Anisotropy Probe

Astronomy

A NASA satellite launched in 2001 June to study small fluctuations in the cosmic microwave background left over from the Big Bang, in succession to the Cosmic Background Explorer. It was positioned at the L₂ Lagrangian point of the Earth’s orbit, 1.5 million km from Earth in the direction opposite the Sun, from where it could observe the Universe without interference from the Sun, Earth, or Moon. WMAP determined the age of the Universe to be 13.73 billion years to within 1% (0.12 billion years); found that the curvature of spacetime is within 1% of flat (Euclidean); determined that ordinary atoms (baryons) make up 4.6% of the Universe, to within 0.1%; dark matter (not made up of atoms) makes up 23.3%, to within 1.3%; and that dark energy makes up the remaining 72.1%, to within 1.5%. WMAP was named in honour of the American cosmologist David Todd Wilkinson (1935–2002). It ceased observations in 2010 August.
http://wmap.gsfc.nasa.gov/ Official mission website.

Space Exploration

A NASA probe designed to make a full-sky map of temperature fluctuations in the cosmic background radiation with much higher resolution, sensitivity, and accuracy than NASA's 1992 Cosmic Background Explorer satellite. WMAP detects anisotropy (tiny fluctuations) in the temperature of the cosmic background radiation to provide a detailed picture of the early universe. Its scientific observation point lies about 1.5 million km from the Earth, in order to prevent interference from terrestrial or solar microwave emissions. WMAP was launched on 30 June 2001 for an 18-month mission. In 2002 it completed full sky scans in April and August, and the WMAP team extended its mission for several years, until the mission was deemed completed in 2010.

单词	Wilkinson Microwave Anisotropy Probe
释义	Wilkinson Microwave Anisotropy Probe Astronomy A NASA satellite launched in 2001 June to study small fluctuations in the cosmic microwave background left over from the Big Bang, in succession to the Cosmic Background Explorer. It was positioned at the L₂ Lagrangian point of the Earth’s orbit, 1.5 million km from Earth in the direction opposite the Sun, from where it could observe the Universe without interference from the Sun, Earth, or Moon. WMAP determined the age of the Universe to be 13.73 billion years to within 1% (0.12 billion years); found that the curvature of spacetime is within 1% of flat (Euclidean); determined that ordinary atoms (baryons) make up 4.6% of the Universe, to within 0.1%; dark matter (not made up of atoms) makes up 23.3%, to within 1.3%; and that dark energy makes up the remaining 72.1%, to within 1.5%. WMAP was named in honour of the American cosmologist David Todd Wilkinson (1935–2002). It ceased observations in 2010 August. http://wmap.gsfc.nasa.gov/ Official mission website. Space Exploration A NASA probe designed to make a full-sky map of temperature fluctuations in the cosmic background radiation with much higher resolution, sensitivity, and accuracy than NASA's 1992 Cosmic Background Explorer satellite. WMAP detects anisotropy (tiny fluctuations) in the temperature of the cosmic background radiation to provide a detailed picture of the early universe. Its scientific observation point lies about 1.5 million km from the Earth, in order to prevent interference from terrestrial or solar microwave emissions. WMAP was launched on 30 June 2001 for an 18-month mission. In 2002 it completed full sky scans in April and August, and the WMAP team extended its mission for several years, until the mission was deemed completed in 2010.
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