You can see nebulae in the clear summer sky.

夏夜可以看到天上星云。

Extragalactic nebula is invisible to the naked eye.

我们用肉眼是看不到河外星系。

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。

The tiny but intriguing yellowish arc visible near the blue nebulae marks young variable star R Coronae Australis.

蓝色星云附近，微但迷人微黄色弧状可见物标出了年轻可见恒星南冕座R星位置。

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，星云中心形成了物质块。这叫做原恒星。

You can see nebulae in the clear summer sky.

在晴朗的夏夜可以天上的星云。

Extragalactic nebula is invisible to the naked eye.

我们肉眼是河外星系的。

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

一粒霉菌是一簇美胜收的花朵，一撮星云是无数天体的蚁聚。

The tiny but intriguing yellowish arc visible near the blue nebulae marks young variable star R Coronae Australis.

在蓝色星云附近，微但迷人的微黄色弧状可见物标出了年轻可见恒星南冕座R星的位置。

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。

You can see nebulae in the clear summer sky.

在晴朗夏夜可以看到上星云。

Extragalactic nebula is invisible to the naked eye.

我们用肉眼是看不到河外星系。

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，一撮星云是无数蚁聚。

The tiny but intriguing yellowish arc visible near the blue nebulae marks young variable star R Coronae Australis.

在蓝色星云附近，微但迷人微黄色弧状可出了年轻可恒星南冕座R星位置。

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质块。这叫做原恒星。

You can see nebulae in the clear summer sky.

晴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。

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。

The tiny but intriguing yellowish arc visible near the blue nebulae marks young variable star R Coronae Australis.

星云附近，微但迷人的微黄可见物标出了年轻可见恒星南冕座R星的位置。

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。

You can see nebulae in the clear summer sky.

在晴朗的夏夜可天上的。

Extragalactic nebula is invisible to the naked eye.

我们用肉眼是不河外系的。

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。

The tiny but intriguing yellowish arc visible near the blue nebulae marks young variable star R Coronae Australis.

在蓝色附近，微但迷人的微黄色弧状可见物标出了年轻可见恒南冕座R的位置。

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，心形成了密集的物质块。这叫做原恒。

You can see nebulae in the clear summer sky.

在晴朗夏夜可以看到天上星云。

Extragalactic nebula is invisible to the naked eye.

我们用肉眼是看到河外星系。

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

一粒霉菌是一胜收花朵，一撮星云是无数天体蚁聚。

The tiny but intriguing yellowish arc visible near the blue nebulae marks young variable star R Coronae Australis.

在蓝色星云附近，微但迷人微黄色弧状可见物标出了年轻可见恒星南冕座R星。

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。

You can see nebulae in the clear summer sky.

晴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。

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聚。

The tiny but intriguing yellowish arc visible near the blue nebulae marks young variable star R Coronae Australis.

星云附近，微但迷人的微状可见物标出了年轻可见恒星南冕座R星的位置。

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。

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.

我们用肉眼是看到河外系。

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

一粒霉菌是一簇美花朵，一撮云是无数天体蚁聚。

The tiny but intriguing yellowish arc visible near the blue nebulae marks young variable star R Coronae Australis.

在蓝色云附近，微但迷人微黄色弧状可见物标出了年轻可见恒南冕R位置。

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。

You can see nebulae in the clear summer sky.

在晴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。

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聚。

The tiny but intriguing yellowish arc visible near the blue nebulae marks young variable star R Coronae Australis.

在蓝色星云附近，微但迷人的微黄色弧状可见物标出了年轻可见恒星南冕座R星的位置。

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。做原恒星。