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

一粒霉菌是一簇美不胜收，一撮云是无数天体蚁聚。

You can see nebulae in the clear summer sky.

在晴朗夏夜可以看到天上云。

Extragalactic nebula is invisible to the naked eye.

我们用肉眼是看不到河外系。

As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.

当我们云在自身重力作用下崩溃和更加快速地旋转时，云中心形成了密集物质块。这叫做原恒。

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

一粒霉菌是一簇美不胜收花朵，一撮星云是无数天体蚁聚。

You can see nebulae in the clear summer sky.

在晴朗可以看到天上星云。

Extragalactic nebula is invisible to the naked eye.

我们用肉眼是看不到河外星系。

As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.

当我们星云在自身重力作用下崩溃和更加快速地旋转时，星云中心形成了密集物质块。这叫做原恒星。

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

一粒霉菌是一簇美不胜收的花朵，一撮云是无数体的蚁聚。

You can see nebulae in the clear summer sky.

在晴朗的夏夜可以看到上的云。

Extragalactic nebula is invisible to the naked eye.

我们用肉眼是看不到河外系的。

As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.

当我们的云在自身重力作用下崩溃和更加快速地旋转时，云中心形成了密集的物质块。这叫做原恒。

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

一粒霉菌是一簇美不胜收的花朵，一撮星云是无数天体的蚁。

You can see nebulae in the clear summer sky.

朗的夏夜可以看到天上的星云。

Extragalactic nebula is invisible to the naked eye.

我们用肉眼是看不到河外星系的。

As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.

当我们的星云自身重力作用下崩溃和更加快速地旋转时，星云中心形成了密集的物质块。这叫做原恒星。

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

一粒霉菌是一簇美不胜收的花朵，一撮是无数天体的蚁聚。

You can see nebulae in the clear summer sky.

在晴朗的夏夜可以看到天上的。

Extragalactic nebula is invisible to the naked eye.

我们用肉眼是看不到河外系的。

As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.

当我们的在自身重力作用下崩溃和更加快速地旋转时，中心形成了密集的物质块。这叫做原恒。

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

一粒霉菌是一簇美不胜收的花朵，一撮云是无数天体的蚁聚。

You can see nebulae in the clear summer sky.

在晴朗的夏夜可以看到天上的云。

Extragalactic nebula is invisible to the naked eye.

我眼是看不到河外的。

As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.

当我的云在自身重力作下崩溃和更加快速地旋转时，云中心成了密集的物质块。这叫做原恒。

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

一粒霉菌是一簇美不胜收的花朵，一撮星云是无数体的蚁聚。

You can see nebulae in the clear summer sky.

在晴朗的夏夜可以看的星云。

Extragalactic nebula is invisible to the naked eye.

我们用肉眼是看不河外星系的。

As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.

当我们的星云在自身重力作用下崩溃和更加快速地旋转时，星云中心形成了密集的物质块。这叫做原恒星。

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

一粒霉菌是一簇美不胜收的花朵，一撮云是无数天体的蚁聚。

You can see nebulae in the clear summer sky.

在晴朗的夏夜可以看到天上的云。

Extragalactic nebula is invisible to the naked eye.

我们肉眼是看不到河外系的。

As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.

当我们的云在自身重力作下崩溃和更加快速地旋转时，云中心形成了密集的物质块。这叫做原恒。

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

一粒霉菌一簇美不胜收花朵，一撮无数天体蚁聚。

You can see nebulae in the clear summer sky.

在晴朗夏夜可以看到天上。

Extragalactic nebula is invisible to the naked eye.

我们用肉眼看不到河外系。

As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.

当我们在自身重力作用下崩溃和更加快速地旋转时，中心形成了密集物质块。这叫做原恒。