chondrules

Work out how old the oldest chondrules are, and you know when the sun ignited.
得出最老的陨石球粒的年龄，你就可以知道太阳是什么时候开始燃烧的。
Sometimes in weathered or broken meteorites, the chondrules may be exposed and evident on the surface.
有时，在风化或破碎的陨石，陨石可能暴露的和表面上的明显。
That means they contain spherical nodules a few millimetres across, known as chondrules.
这意味着它们含有直径数毫米的球形岩球（或叫做陨石球粒，chondrule）。
Achondrites: This name is given to meteorites which do not have chondrules and originate from different areas of the solar system.
无球粒陨石：这个名字，是考虑到那些没有陨石球粒和来自太阳系不同领域的。
Formation ages of Ca-Al-rich inclusions and chondrules may speculate the time-scale of evolution of the early solar nebula.
原始球粒陨石中富钙-铝包体和球粒的形成年龄，可作为早期太阳星云演化的时标；
Most stone meteorites contain grain-like components known as chondrules.
大部分石陨石中含有陨石已知的粮食般的组件。
Chondrules are spherical bodies formed early during the formation of the solar nebula.
The most common is the Ordinary Chondrite which will generally show small round features called "Chondrules" .
最常见的是普通球粒陨石通常会显示小而圆的特点被称为“球粒”。
That chondrules formed in such quantities suggests that the heating which created them was widespread.
这么大量的陨石球粒的形成说明能使它们形成的热量的范围很大。
To reach back, you need to look in the dust grains in chondrites, rather than at the chondrules.
如果是追溯太阳系形成之前，你需要研究球粒状陨石中的灰尘颗粒，而不是陨石球粒。