* Distance: We can only see stars within a certain distance from Earth. The further away a star is, the fainter it appears.
* Telescopes: The number of stars we can see depends on the power of our telescopes. More powerful telescopes allow us to see fainter, more distant stars.
* Brightness: There are many faint stars that are too dim for us to see with the naked eye, even with powerful telescopes.
However, we can say:
* Naked eye: Leo has about 70 stars visible to the naked eye under ideal conditions.
* Catalogues: Star catalogues list many more stars within the constellation's boundaries, but they still only represent a fraction of the total.
So, the total number of stars in Leo is likely vast, but we only know a small portion of that number.
