What is more, asteroid porosities may have been even greater immediately after they accreted from the debris of the early solar system.
更重要的是，小行星在刚由早期太阳系里的碎片聚合而成时，孔隙率可能更大。
Comets are conglomerations of ice, dust and rock from the early solar system, whose cores have remained physically and chemically unchanged ever since.
慧星是早期太阳系中冰、灰尘和岩石的聚合物。 它的核心在形成后没有发生过物理、化学的变化。
INDICATOR OF EVOLUTION HISTORY OF EARLY SOLAR NEBULA--ACCRETION AND FORMATION PROCESS OF DIFFERENT TYPE OF METEORITE PARENT BODY
早期太阳星云演化历史的指示剂——不同类型陨石母体的吸积和形成过程
A large chunk of comet Wild2 does indeed come from the beginnings of our own Sun.
“怀尔特2”彗星的一大部分确实来自早期的太阳。
During the early stages of planetary evolution they served to sweep the solar system.
在行星演化的早期，他们用来清扫太阳系。
Good morning, young man,@ said Sun.
太阳神说：“早啊，年轻人。
The young are as vigorous as the morning sun at eight or nive .
你们青年人朝气蓬勃，正在兴旺时期，好像早晨八、九点钟的太阳。
Perhaps at an early stage the solar system consisted of comet-sized objects.
也许，早期阶段的太阳系是由彗星那么大小的天体所构成的。
"The earliest instrument for determining latitude was the quadrant, which measured the altitude of the polestar or the noonday sun."
早期测定纬度的仪器是象限仪,测量北极星或正午太阳的高度。
Some of these early steps in the development of life may have taken place in interstellar gas coluds before the solar system formed.
生命发展的某些早期过程可能早在太阳系形成以前的星际气体云中就已发生。
the annual course of the sun
太阳在一年期间的运行.
International Years of the Quiet Sun
太阳静止期国际观察年
IASY (International Years of the Active Sun)
太阳活动期国际观测年
a calendar based on solar cycles.
基于太阳周期的历法。
A cycle of the sun takes a year.
太阳循环周期需要一年。
The sun rises at 6 o'clock in the morning and set at 6 o'clock in the evening.
太阳在早上6:00升起，在晚上6:00落下。
Each day the sun rose earlier and set later.
太阳一天比一天升得更早，落得更迟。
In the mornings they beguiled the sun with music.
天天早晨，他们用音乐来取悦太阳。