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.
The absolute best that is theoretically possible (on a 9000 foot mountain top where the air is free of dust and under very low airglow skies) is about 5,500 stars, if you can see 7.2 at the zenith. I wonder how many of these are doubles where you would only see them as one.