天体的

As a coelostat, MA tracks the motion of celestial objects observed at their meridian passages.

MA作为定镜跟踪运动，望远镜在中前后进行观测。

A bit of mould is a pleiad of flowers;a nebula is an ant-hill of stars.

一粒一簇美不胜收花朵，一撮星云无数蚁聚。

Bright ejecta rays such as these are produced as impacts excavate and eject relatively unweathered subsurface material.

这些放射状陨石坑产生于撞击溅出地下物质，绵延在遍布陨石坑星表面数百公里。

As described above, the collapse of a rotating cloud of gas and dust leads to the formation of an accretion disk through which matter is channeled onto a central protostar.

部分重力能量在崩溃过程中会以红外线形式损失掉，其馀则会用于增加核心温度。

If the incoming projectile were a white dwarf—a superdense star that packs the mass of the sun into a body a hundredth the size—the residents of Earth would be treated to quite a fireworks show.

如果接近一颗白矮星（whitedwarfstar，一种超密恒星，质量约等同于太阳，但其积却不到太阳百万分之一），那麽地球上居民将可以看到一场壮丽烟火秀。