Sirius the dog star, is a close type A1 star and it's the brightest star in the northern hemisphere's sky. It's the bright star in the left half of the picture below. You can find it easily if you recognize the constellation Orion in the sky. Sirius, in Canus Major, follows Orion just to the East.

When observed through a short focus (f/5) telescope fitted with an ocular prism, hydrogen absorbtion can be easily seen in the spectrum:

For comparison, here is the emission spectrum of hydrogen:

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