能量來(lái)自太陽(yáng)的核心

A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun’s very center. It is here that is to be found the source of the energy that the Sun constantly pours out into space as light and heat. This energy is librated at the centerof the Sun as billions upon billions of nuclei of hydrogen atoms collide with each other and fuse together to form nuclei of helium, and in doing so, release some of the energy that is stored in the nuclei of atoms. The output of light and heat of the Sun requires that some 600million tons ofhydrogen be converted into helium in the Sun every second. Thisthe Sun has been doing for several thousands of millions of year.
概說(shuō)生命的物理和化學(xué)特性必須始于太陽(yáng)--確切地說(shuō)，是太陽(yáng)的核心，而非地球。能量來(lái)自太陽(yáng)的核心。在這里，太陽(yáng)不停地以光和熱的形式向空間傾瀉出能量。數(shù)十億計(jì)的氫原子核在太陽(yáng)的核心碰撞并且聚變生成氦。在此過(guò)程中一部分原本儲(chǔ)存于原子核中的能量被釋放出來(lái)。太陽(yáng)所產(chǎn)生的光和熱需要每秒將六億噸氫轉(zhuǎn)化為氦。這樣的轉(zhuǎn)化在太陽(yáng)中已經(jīng)持續(xù)幾十億年了。

The nuclear energy is released at the Sun’s center as highenergy gamma radiation, a form of electromagnetic radiation like light and radio waves, only of very much shorter wavelength. This gamma radiation is absorbed by atoms inside the Sun to b reemitted at slightly longer wavelengths. This radiation , in its turn is absorbed and reemitted. As the energy filters through the layers of the solar interior, it passes through the Xray part of the spectrum eventually becoming light. At this stage, it has reached what we call the solar surface, and can escape into space without being absorbed further by solar atoms. A verysmall fraction of the Sun’s light and heat is emittedin such directions that after passing unhindered through interplanetary space, it hits the Earth.
核能在太陽(yáng)的核心被釋放為高能的伽馬射線(xiàn)。這是一種電磁射線(xiàn)，就象光波和無(wú)線(xiàn)電波一樣，只是波長(zhǎng)要短得多。這種伽瑪射線(xiàn)被太陽(yáng)內(nèi)的原子所吸收，然后重新釋放為波長(zhǎng)稍長(zhǎng)一些的光波。這新的射線(xiàn)再次被吸收，而后釋放。在能量由太陽(yáng)內(nèi)部一層層滲透出來(lái)的過(guò)程中，它經(jīng)過(guò)了光譜中X射線(xiàn)部分，最后變成了光。在此階段，能量到達(dá)我們所稱(chēng)的太陽(yáng)表層，并且離散到空間而不再被太陽(yáng)原子所吸收。只有很小一部分太陽(yáng)的光和熱由此方向釋放出來(lái)，并且未被阻擋，穿越星空，來(lái)到地球。