White Dwarf

基本解释

An astronomer makes the case that the best place to search for habitable planets may be very close to white dwarf stars.
一位天文学家提出了一种新想法，在靠近白矮星的地方找最寻适合生命居住的行星。
Whena star the mass of our Sun uses up its nuclear fuel, it expels most of itsouter layers to leave just a very hot core called a white dwarf.
当一颗质量相当于太阳的恒星耗尽其核燃料，它便会剥离其外层的绝大多数物质，只留下一个温度极高的核心，也就是所说的“白矮星”。
Scientists hadspeculated that at the bottom of a white dwarf’s 31 mile (50 kilometer)-thickcrust was crystallized carbon and oxygen, similar to a diamond.
根据科学家的猜测，一颗白矮星31英里（约合50公里）厚的星壳底部可能由晶化碳和氧构成，结构与钻石类似。

The ferocity of a typical supernovae explosion obliterates the white dwarf utterly, leaving behind no trace of it.
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The white dwarf is thought to have later blown up in a supernova after siphoning matter, or fuel, from a nearby star.
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The observations also show for the first time that a white dwarf can create a cavity around it before blowing up in a Type Ia event.
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one of a large class of small faint stars of enormous density (on average 108 kg/m) with diameters only about 1 per cent that of the sun, and masses less than the Chandrasekhar limit (about 1.4 solar masses). It is thought to mark the final stage in the evolution of a sun-like star