How Big is the Universe??









How Big is the Universe

The Sun is 1.3 million bigger than the Earth . How strange it is!

Let's see, it is time to see the around of Milky Way galaxy.

There are a big star named Sirius A . It is only 9 light-year away from us. Its size is 2 times than the Sun. This is the brightest star in our sky.

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