 Stars are not spread uniformly across the universe , but are normally grouped into galaxies along with interstellar gas and dust . A typical galaxy contains hundreds of billions of stars , and there are more than 100 billion ( 1011 ) galaxies in the observable universe . In 2010 , one estimate of the number of stars in the observable universe was 300 sextillion ( 3 × 1023 ) . While it is often believed that stars only exist within galaxies , intergalactic stars have been discovered . 
 Stars are not spread uniformly across <a href='None' title='1'><mark>the</mark></a><a href='negative_concord' title='2'><mark>universe</mark></a> , but are normally grouped into galaxies along with interstellar gas and dust . A typical galaxy <a href='uninflect' title='3'><mark>contains</mark></a> hundreds of billions of stars , and <a href='dey_it' title='4'><mark>there</mark></a> are more than 100 billion ( 1011 ) galaxies in the observable universe . In 2010 , one estimate of the number of stars in the observable universe was 300 sextillion ( 3 × 1023 ) . While it is often believed that stars only exist within galaxies , intergalactic stars <a href='been_done' title='5'><mark>have</mark></a> been discovered . 
Stars ain't spread uniformly across no universe , but are normally grouped into galaxies along w/ interstellar gas and dust . A typical galaxy contain hundreds of billions of stars , and it is more than 100 billion ( 1011 ) galaxies in da observable universe . In 2010 , one estimate of the number of stars in the observable universe was 300 sextillion ( 3 × 1023 ) . While it is often believed dat stars only exist within galaxies , intergalactic stars done been discovered .