When used this way in the present tense, the hay form of haber is used. 1  Hay que saltar. 2  Hay que conocerlo para comprenderlo. 3  HabrÃ¡ que salir a las dos.
So, even though we cannot actually count the number of stars in the galaxy, we can estimate the number of stars in the galaxy as roughly 100 billion (100,000,000,000). It turns out that there are many more stars with mass less than the mass of the Sun than with mass more than the mass of the Sun. So, it all works out right.
In the observable universe there are about 10 billion galaxies.  Assuming galaxies have an average of 100 billion stars each, the  observable universe has about 1 billion trâ¦illion stars (or  1,000,000,000,000,000,000,000).