The galaxy has a spiral structure.

这个星系具有螺旋形结构。

The galaxy has existed for an eon.

那个星系已经存在了极长的时间段。

Our solar system is part of the galaxy.

我们的太阳系是银河的一部分。

There are countless stars in the galaxy.

银河中有无数的恒星。

The galaxy is a massive system of stars.

银河系是一个巨大的恒星系统。

There are millions of stars in the galaxy.

银河系中有数百万颗星星。

There are billions of stars in the galaxy.

银河系中有数以亿计的恒星。

Scientists discovered a new psr in the galaxy.

科学家在银河系中发现了一颗新的脉冲星。

Scientists are studying the origin of the galaxy.

科学家们正在研究银河的起源。

The galaxy is one of many galaxies in the universe.

银河系是宇宙中众多星系之一。