When I was reading about the hydrogen spectrum , I came across the statement;

> Only Balmer series of hydrogen spectrum can be visible to our eyes.

I really got surprised how only Balmer series can be visible to our eyes. However I can agree this because of the *abundance of hydrogen in the universe*

Then I got a question , **Why can't other hydrogen spectrum line can't be visible ?**
Though other line are also in this universe. 

Kindly help me to find the logic out. Thank you for spending your valuable time.